Electrolysis Of Copper Chloride Observations


7 v) is energetically more difficult than the reduction of water (-1. - This is copper. In the simple electrolysis cell (left diagram), the graphite (carbon) electrodes are, through a large rubber bung, 'upwardly' dipped into an solution of dilute copper chloride. Expected observations: Effervescence of colorless odorless gas (oxygen) Formation of a solid at the cathode, where Copper(II) ion is reduced to form Copper atom. It means the charge is taken away from the potassium and chloride ions at the electrodes. Property Before experiment After experiment RESULTSAND DISCUSSION Infer from your observations about the changes in colours of copper sulphate solution and iron nail. During electrolysis:the cathode gets coated with copper. Record observations in your data table. You don't specify whether this is the electrolysis of aqueous sodium chloride or the molten salt. Magnesium + oxygen = magnesium oxide 5. Electrolytic cell A contains sodium chloride solution. Purification of copper is achieved by electrolysis, as illustrated in Figure 23. The Highway Code Taking driving lessons Find driving schools, lessons and instructors Practise vehicle safety questions and Prepare for your theory test Theory test revision and practice Take a practice theory test Theory and hazard perception test app Step 4: Book and manage your theory test You need a provisional driving licence. The electrolysis of copper sulfate solution (CuSO 4 (aq)) Copper sulfate solution is composed of copper ions (Cu 2+), sulfate ions (SO 4 2-), hydrogen ions (H +) and hydroxide ions (OH –). Electrochemical deoxygenation of porous CuO pellet to prepare copper was investigated in the 33. The products of electrolysis can be predicted for a given electrolyte. The reactions at each electrode are called half equations. Electrolytes are vulnerable to electrolysis. Electrolysis of aqueous sodium chloride. A solution of sodium chloride in water contains:. Electrolysis of aqueous solution. To observe the effect of electrolysis of aqueous silver nitrate solution using an inert (platinum) anode and silver cathode. In its anhydrous state, cobalt chloride is blue in color. Give reasons for the following: (a) Electrolysis of molten lead bromide is considered to be a reaction in which oxidation and reduction go side by side i. Addition of soluble iodide to an aqueous solution of copper(II) ions results in the formation of a copper(I) iodide precipitate, which rapidly decomposes. Attach a wire to the copper strip. Electrolysis is the break down of a substance using electricity. A r of Cu = 63. write half equation for negative electrode ( cathode) and write the half equation for the positive electrode (anode) then write the full ionic equation for electrolysis of copper (ii) chloride. [½] 24 2 4 Sodium sulphate Barium chloride Barium sulphate Sodium chloride. Electrolysis. Copper chloride solution is a clear, green liquid. It is a weak oxidizing agent. Microscale Electrolysis of Copper Chloride. Reduction takes place on the cathode (negative electrode) while oxidation occurs on the anode (positive electrode). - Zinc is thus oxidised to zinc ions, while copper (II) ions are reduced to copper atoms. Spatula or scoopula. Each of these salts lowers the mp of the other. • Carry out an experiment to investigate the electrolysis of copper (II) sulphate solution. e, a redox reaction. Electrolysis of copper(II) chloride - Duration: 8:15. [1] Chapter - 1 : Chemical Reactions and Equations If the reactants are in solid state, then reaction will not take place between sodium sulphate and barium chloride. Answer: During electrolysis of aqueous copper sulphate using copper electrodes, the two anions OH –. Electrolysis is important in that it is used in the extraction of reactive metals, such as potassium, sodium, calcium, magnesium and aluminium; electroplating metals to improve their appearance and reduce corrosion/prevent rusting and in refining metals such as copper. of copper sulfate solution in GCSE Chemistry. Cut & Stick diagram of electrolysis of copper chloride solution. Replies: 1 Views: 3274 25/08/2010 06:50:55 by Bored chemist: Can electrolysis of water with copper electrodes make copper hydroxide? Started by UltimateTheory Board Physics, Astronomy & Cosmology. The diagram shows the electrolysis of lead(II) bromide using inert electrodes. The sulphate ions remain in solution. It decomposes to CuCl and Cl 2 at 1000 °C:. In its anhydrous state, cobalt chloride is blue in color. Goal: To prepare copper(I) chloride by reducing copper(II) chloride with sulfite ions in the presence of chloride ions. Brine is a solution of sodium chloride (NaCl) and water (H 2 O). • as sulphuric acid, sodium hydroxide. Property Before experiment After experiment RESULTSAND DISCUSSION Infer from your observations about the changes in colours of copper sulphate solution and iron nail. Copper deposited on cathode. You will combine a series of. In the electrolysis of lead(II) bromide, lead (a metal) was formed at the cathode and bromide (a non-metal) was formed at the anode. Observation. A red-brown precipitate drops to the bottom of the beaker. Observation when added to water. Using pencil leads as electrodes it is possible to carry out electrolysis experiments at school on a very small scale or micro-scale. Copper II chloride HCl aq. Electrolysis of Sodium Chloride solution produces Chlorine gas at the anode and hydrogen gas at the cathode, leaving a solution of Sodium Hydroxide (caustic soda). Starter: Ions, ionic compounds, cations (positively charged ions), anions (negatively charged ions), anode (positive electrode), cathode (negative electrode), Electrolyte, electrons, flow of electrons. CAUTION: Observe the mixture from the side; do not look directly down into the beaker. 6 Explaining the electrolysis of aqueous copper sulfate using graphite and copper electrodes. Copper(II) chloride (CuCl 2) put in water will dissolve into copper ions and chloride ions. 6 LE 2018 06204318 (e) When cobalt(II) chloride is added to water an equilibrium is established. During electrolysis, Cu2+ and H+ ions: migrate to the cathode, but only the Cu2+ ions are discharged. moomoomath. Copper can be extracted from its ore by heating it with carbon. (b)€€€€ The diagram shows an apparatus used for the electrolysis of sodium chloride solution. A source of direct current is connected to a pair of inert electrodes immersed in molten sodium chloride. This particular experiment involves the electrolysis of copper (II) sulphate using a pair of copper electrodes. Electricity is passed through aqueous sodium chloride solution (brine). Put approximately 25 mL of water into a beaker. 53 describe simple experiments for the electrolysis, using inert electrodes, of aqueous solutions of sodium chloride, copper (II) sulfate and dilute sulfuric acid and predict the products. We are going to look carefully at what happens with two liquids, water and copper sulphate, but first the general ideas. Purpose: According to The Real Elliot's instructable titled Stop using Ferric Chloride etchant! (A better etching solution. The products are easy to show and the sum equation of the reaction is simple. electrolysis of brine (concentrated aqueous sodium chloride): The ions present in the electrolyte are H + and OH - from water and Na + and Cl - from sodium chloride. electrolisis, Electrolyte, fused Lead bromide, Copper sulphate, acidified water, electroplating ICSE CHEMISTRY: ICSE CHEMISTRY - Electrolysis notes ICSECHEMISTRY16 gives you a complete support to you to give your best in ICSE exam. Correct answers: 3 question: (i) State the observations made when the blue copper (II) sulphate y(ii) Identify liquid Y and write an equation for its formation. copper (II) chloride solution plus aluminum foil 5. In this activity, you will use electrolysis to isolate copper from a copper chloride solution. Make two small holes in the cardboard disk and push the electrodes through the holes as. Electrolysis is used in the production of copper metal, because the electric current is used to refine the copper and remove any impurities, without melting the ore, which uses a lot more energy. inert electrodes. The negative electrode (the cathode) is a bar of pure copper. Be sure to record your observations of this instructor-led demonstration. Bard* Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 105 East 24th Street Station. Electrolysis of copper sulphate solution using platinum or carbon electrodes. Copper sulfate CuSO 4 is so useful that is produced on a large scale. U6 Micro-Electrolysis of Copper Chloride. 5 kWh per kg of copper. Middle School. Discuss the reason(s). Electrolysis of Aqueous Sodium Chloride: (The overpotential or overvoltage problem) When we electrolyze a sodium chloride solution, we see that water is reduced to hydrogen at the cathode exactly as we had (above) for the case of NaF electrolysis. Hypothesis Ions of higher concentration will be selectively discharged during electrolysis. 45 g/mol respectively, 100 g of NaCl contains 39. A white coating appears on the copper electrode almost immediately, and after a few minutes, the copper electrode has a definite zinc plating on it. Copper electrodes Copper(II) sulphate solution. e, a redox reaction. In the electrolysis of lead(II) bromide, lead (a metal) was formed at the cathode and bromide (a non-metal) was formed at the anode. A substance that can be electrolysed is called an electrolyte. 4 Electrolysis of copper sulphate using copper electrodes. Cut & Stick diagram of electrolysis of copper chloride solution. If you continue browsing the site, you agree to the use of cookies on this website. chloride and potassium chloride with p. At the cathode sodium ions are converted to sodium metal. 00 g of iron powder reacted with excess copper sulfate solution to produce 11. Answer: During electrolysis of aqueous copper sulphate using copper electrodes, the two anions OH –. and S0 4 2-migrate to the anode, but none of them get discharged because the copper of the anode dissolves in the solution producing copper ions and electrons. w atb) Pellets of sodium hydrogen and anhydrous Copper (II) sulphate were pydishes and left in the open for two hours. purification of ores such as copper sulfide ore. During electrolysis of water, the amount of hydrogen liberated is two times amount of oxygen, therefore volume of hydrogen is two times volume of oxygen, owing. 3 After a while the emf of this electrochemical cell decreases. First published in 2006 The electrolysis produces two gases, chlorine and Gas A. The two ingredients initiate the production of copper chloride which in turn performs the dissolution of the base metals. At the copper anode, copper goes into solution by giving up two electrons. 14% recovery and 99. 0 g of copper (II) sulfate pentahydrate and place into a standard size test tube. 3 Variables 6 (a) Manipulated variable: Concentration of ions in Figure 6. Key words: recovery of silver, silver chloride, silver nitrate of silver from silver residues of analytical laboratory becomes necessary. Cathode: Reddish brown Cu is deposited. ABSTRACT External corrosion of underslab, copper, hot water tubing has resulted in a great deal of construction defect litigation. Electrolysis of aqueous solution is different from electrolysis of molten electrolyte because. Watch glass. e, a redox reaction. An electrolyte formed by dissolving an ionic compound contains: hydrogen ions from the water, and positive ions from the compound. Pick up the container of copper chloride dehydrate, and observe material. D Introduction A salt molecule is made up of one sodium atom and one chlorine atom. compared, and the reduction of silver chloride by formaldehyde, which gave 95. Copper metal does occur naturally, but by far the greatest source is in minerals such as chalcopyrite and bornite. copper (II) chloride in water. At the anode, however, copper ions go into solution in preference to the discharge of either OH - or S042. Electrolysis of copper. jpg 404 × 464; 137 KB. (no rating) 0 customer reviews. For example, if one metal (copper) is more conductive than the other (galvanized steel), the electricity will jump to the copper piping more readily, easily traveling through the highly conductive water. Electrolysis involves passing an electric current through either a molten salt or an ionic solution. Created: May 2, 2020. Observation when added to water. The electrolysis of sodium chloride solution also produces chlorine and sodium hydroxide. This technique is commercially significant as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. If the anode (+ve) is inert (for instance platinum or carbon) it will not react with the Chlorine ions, and the gas will be given off as bubbles and can be separated and collected. A cheaper alternative to the copper sulfate solution is a 50:50 mixture of 0. This reaction takes place in a unit called an electrolyzer. Electrolysis of Copper Chloride Solution. Because most metal hydroxides are insoluble, an alkali added to a solution of a metal salt will precipitate an insoluble metal hydroxide. During electrolysis of water what happens to the volume of water displaced? Started by tommya300 Board General Science. Chemical Concepts. GL163 - Make-it guide - microscale electrolysis apparatus Make-it guide - an electrolysis cell Electrolysis of Molten Salts Microscale Electrolysis of Lead Nitrate Microscale Electrolysis of Copper Chloride Soldering wire to a solder tag PP059 - Micro-electrolysis of copper(II) chloride solution Related Searches. For example, you cannot separate copper from its ore. Electrolysing Copper(II) Sulfate Solution. occur in each equation. Electrolysis of Lead Bromide. We will use 50 ml of copper chloride solution on every trial experiment we do. When a solution of tin (II) chloride is electrolyzed tin metal and chlorine gas are produced: SnCl2 (aq) → Sn (s) + Cl2 (g) When a solution of copper (II) chloride is electrolyzed copper metal and chlorine gas are produced: CuCl2. Obtain a piece aluminum foil. (c) sonal brushes her teeth with the best quality toothpaste everyday. As a result, oxidation occurs at the zinc rod (the anode) and zinc metal loses electrons to become zinc ions, that is, Zn (s) - 2e---> Zn 2+ (aq) The electrons then flow from the zinc rod to the copper rod through the external circuit. Case Study: Electrolysis Of Silver Nitrate Using Silver Electrodes. Use a spatula to add some copper chloride dehydrate to the beaker filled with water. loses electrons, has an overall. Correct answers: 3 question: (i) State the observations made when the blue copper (II) sulphate y(ii) Identify liquid Y and write an equation for its formation. A source of direct current is connected to a pair of inert electrodes immersed in molten sodium chloride. write a word equation for the electrolysis of copper chloride. One of the solutions contains dissolved sodium chloride (NaCl). Cu 2+ + 2e - → Cu. Electrolysis of copper(II) chloride solution. 963Hz + 852Hz + 639Hz | Miracle Tones | Activate Pineal Gland | Open Third Eye | Heal Heart Chakra - Duration: 1:11:11. But the name 'copper (II)' is a massive clue and all you need to. Electrolysis of CuCl2 Objectives: To separate copper from copper chloride (CuCl2). 1 the electrolysis of concentrated aqueous sodium chloride 2 the electrolysis of dilute sulfuric acid. The Highway Code Taking driving lessons Find driving schools, lessons and instructors Practise vehicle safety questions and Prepare for your theory test Theory test revision and practice Take a practice theory test Theory and hazard perception test app Step 4: Book and manage your theory test You need a provisional driving licence. 6 Explaining the electrolysis of aqueous copper sulfate using graphite and copper electrodes. Make two small holes in the cardboard disk and push the electrodes through the holes as. They use chalk as the model for masonry, copper(II) chloride solution as a model for soluble copper and a freshly prepared slurry of copper phosphate as a model for a hard stain of copper on masonry. Question: 4 (a) In one experiment involving the electrolysis of molten sodium chloride, 0. [CoCl 2- 4] + 6H 2 O [Co(H 2 O) 6]2+ + 4Cl - bluepink 2-(i) A student adds water to a blue solution containing [CoCl 4] ions. Purpose: According to The Real Elliot's instructable titled Stop using Ferric Chloride etchant! (A better etching solution. The lessons include: 1. A battery is like an electron pump, and conducting wires are similar to pipes, allowing electrons to flow from one site to another. John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19. ELECTROPLATING: An Example of Electrolysis EXPERIMENT 25 PROCEDURE As your instructor performs the experiment, record observations in Data Table 1. To observe the effect of electrolysis of aqueous silver nitrate solution using an inert (platinum) anode and silver cathode. A solution of an alkali in water contains hydroxide ions OH - (aq). When the chloride concentration is large the chloride ions lose electrons and chlorine gas is released at the electrode, but when it is in low concentration the hydroxide ions from the water are preferentially released. Explanation: Zinc is more reactive than copper. The H + ions remain in solution. 02-9(c) A student used the set-up shown below to conduct a microscale experiment on electrolysis. The solution may be represented by K^+(aq) and Cl^(-)(aq) At the positive electrode (anode) the following happens: Cl^- ->Cl+e^- 2Cl->Cl_2(g) At the other side (cathode): K^+ +e^(-) ->K K+H_2O->K^+ +OH^- +H 2H->H_2(g) So the net result is that at the anode chlorine gas is released, at the cathode hydrogen. This edition first published 2014 © 2014 John Wiley & Sons, Ltd. State two appropriate observations for the above electrolysis reaction. Electrolysis of a fused sodium chloride-calcium chloride mixture occurs in the Downs cell at a temperature of about 550 C, producing molten elemental sodium and gaseous chlorine. Pour 2ml of copper (II) sulfate in a. The Reaction of Aluminum to Copper in Electrolysis Electrolysis involves the manipulation of chemical reactions based on their electric potential. A cheaper alternative to the copper sulfate solution is a 50:50 mixture of 0. New York: Springer Publishing Company, 1974. Electrolysis of aqueous sodium chloride with copper electrodes produces (among other things) a blue-green foam that can be collected and converted to the hydrate. ” As we know, water is a model of molecular compound, in which atoms are bounded with each other by sharing electrons. C copper cooking utensils copper has a high density D copper electrical wiring copper is a good conductor of electricity 27 Which statement about the manufacture of aluminium by electrolysis is correct? A Aluminium ions are oxidised to aluminium by gaining electrons. Electrolysis is a method of removing individual hairs from the face or body. Passing an electric current through a liquid is called ELECTROLYSIS. chloride and potassium chloride with p. copper wire aqueous sodium chloride molten sodium chloride The diagram shows the electrolysis of aqueous copper( II) sulphate using copper. Bard* Center for Electrochemistry, Department of Chemistry and Biochemistry, University of Texas at Austin, 105 East 24th Street Station. 5% (A) and electrolysis of CO2 in 50 mL NaHCO3 0. For example, if you heat sodium chloride until it melts, it is called molten sodium chloride, but if you dissolve sodium chloride in water, it is called aqueous sodium chloride. These particles collect at the electrode with the opposite charge in electrolysis. Copper(I) chloride, commonly called cuprous chloride, is the lower chloride of copper, with the formula CuCl. (aa) Excess chlorine gas is passed over hot iron filings. Electrolysis of concentrated sodium chloride solution using graphite electrodes Reactions Anode(+) Oxidation 2Cl-(aq) --> Cl2(g) +2e-Discharged Cl-(aq) (high concentration). Solution Observation at anode Observation at Cathode Test with damp red and Blue litmus Test with lit splint Dil H2SO4(aq) KOH(aq) NaI(aq. But, the observations will be the same - namely that copper metals coats the cathode, and you can observe the bubbles of gas at the anode (in the video this is oxygen gas, and not chlorine gas as in the investigation here. The electrolysis of many salts (e. As an example we may take the case of a solution of a salt such as copper sulphate in water, through. 9\,gm\] of aluminium was deposited on the cathode. electrolysis. All I know is that it involves copper (II) chloride and magnesium; I haven't actually observed anything myself. 004 grams, and the initial moles of copper was 0. What type of reaction is occurring? (bb) Magnesium metal is added to nitrogen gas. purification of ores such as copper sulfide ore. The best method for removing copper from the pregnant solutions was precipitation of a basic salt by pH adjustment. a)Aluminium is used in the manufacture of pans and sufurias. (no rating) 0 customer reviews. Aft 10mins, a pink color substance was deposited on one electrode and a gas which can bleach moist litmus paper was evolved at the other electrode. Its chemical formula is CuCl 2. write a word equation for the electrolysis of copper chloride. Observe what happens for about 30 seconds. Calcium carbonate (heat) Calcium + carbon dioxide 6. When the passage of an electric current through a substance is accompanied by definite chemical changes which are independent of the heating effects of the current, the process is known as electrolysis, and the substance is called an electrolyte. Electrolysis of aqueous solution is different from electrolysis of molten electrolyte because. Meditative Mind 10,772,932 views. Copper chloride must be a compound because when electrolysis caused a chemical. The validity of Faraday’s Second Law of Electrolysis is evident from the following observations: One faraday (IF) discharges one mole of H + , Na + , Ag + , Cl - and OH - ions. Apparatus and chemicals. ehsaltiora. The purpose of this experiment is to help you distinguish observation from interpretation while examining a chemical reaction. More on Electrolysis Note: This post is mainly for Single Science although it could be good background information for Double Award anyway. Write a balanced chemical equation for each reaction below. John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19. You should read the document on my web site about copper chloride. Copper is a metal. The volume of chlorine liberated at the anode will be The volume of chlorine liberated at the anode will be. Since solid pieces of copper are involved, $\ce{Cu}$ must be considered in the reduction potential as well. (NTP, 1992) from CAMEO Chemicals. Electrolysis of copper chloride is a way of splitting up decomposition of the compound copper chloride using electrical energy. Small cupreous artifacts, such as coins, require only a couple of hours in electrolysis, while larger cupreous specimens, such as cannons, may require. Copper carbonate =heat=> Copper oxide + carbon dioxide. More on Electrolysis Note: This post is mainly for Single Science although it could be good background information for Double Award anyway. 35 MB Solid oxide electrolyser cell 2x60cell stack. 13g Observations: The solution turned a darker blue. Sugar, on the other hand, is composed of carbon, oxygen, and hydrogen and has covalent bonds. Thus the hydroxyl mentioned above decomposes into water and oxygen, and the chlorine produced by the electrolysis of a chloride may attack the metal of the anode. Reduce copper oxide with natural gas, methane: 16. 83 V versus Na +(aq) + e-6Na(s), EE-2. a piece of metal through which carbon the current enters and leaves the elctrolyte. The ions are "forced" to undergo either oxidation (at the anode) or reduction (at the cathode). Video transcript When those two electrons reach our copper electrode, we know we have copper two plus ions in solution. Some information about two different types of electrolysis cell is given below. In the simple electrolysis cell (left diagram), the graphite (carbon) electrodes are, through a large rubber bung, 'upwardly' dipped into an solution of dilute copper chloride. 34 g of copper. This is an outline of the required steps to undertake one of these methods. Intensity of blue solution decreases as Copper(II) has been reduced to Copper atom. Quantitative electrolysis. Whereas in the case of copper electrode, the electrode can oxidize itself. Which of the following equations represents the reaction that takes place at the cathode during the electrolysis of aqueous silver nitrate with carbon electrodes? A Ag+ (aq) + e- -->…. Electrodes: Silver. hydroxide ions from the water, and negative ions from the compound. Draw an electrolytic cell illustrating the electrolysis of molten nickel(II) bromide, NiBr 2. purification of ores such as copper sulfide ore. Lab: Electrolysis of Copper (II) Chloride Background: In a paragraph explain electrolysis, oxidation, reduction, anode & cathode as well as the difference between the process of electrolysis and using a battery. Electrolysis of Molten Sodium Chloride Electrolysis of the ionic compound Sodium Chloride is commonly carried out to obtain Sodium metal. An electrolysis lab completed in class. Silver chloride is alloy of silver and chloride. 2 (b) The standard electrode potentials for three electrode systems are given below. OBSERVATIONS Sl. Cut & Stick diagram of electrolysis of copper chloride solution. Electrolysis of copper II sulphate solution using copper electrodes (participating electrodes) The ions present in the solution are: copper ions Cu2+ chloride ions SO42hydrogen ions H+ hydroxide ions OH-At the cathode, The positive ions are attracted to the negative cathode. The negative chloride ions (Cl −) are attracted to the positive electrode. Iron filings + copper sulphate (10cm3) 3. At the cathode, each copper ion gains two electrons. Yet this relatively new copper water line was clearly a victim of pipe electrolysis. Touch the bottom of the test tube to check for temperature changes. In order to electrolyze water , a little amount of an electrolyte (salt or acid) is added to water, which makes it an electrolyte. There are a number of ways to investigate the electrolysis. Electricity is passed through aqueous sodium chloride solution (brine). This edition first published 2014 © 2014 John Wiley & Sons, Ltd. Stray current corrosion or interference, too often erroneously referred to as "electrolysis," can occur on underground copper water tubes when uncontrolled direct currents exist in the area. DATA TABLE 1: OBSERVATIONS System Observations dry copper(II) chloride dihydrate copper(II) chloride in water initial temperature: final temperature: The foil is plated with copper and corrodes rapidly. question_answer50) During electrolysis of fused aluminium chloride \[0. 963Hz + 852Hz + 639Hz | Miracle Tones | Activate Pineal Gland | Open Third Eye | Heal Heart Chakra - Duration: 1:11:11. Q871-08 What is left behind in the solution when a solution of copper (II) sulphate(aq) is electrolysed until there is no further deposition of copper at the cathode?. (c) sonal brushes her teeth with the best quality toothpaste everyday. This website and its content is subject to our Terms and Conditions. Electrolysis rate means the extent to which electrolysis occurs in a certain time. The ions are "forced" to undergo either oxidation (at the anode) or reduction (at the cathode). Tes Global Ltd is registered in England (Company No 02017289) with its registered office at 26 Red Lion Square London WC1R 4HQ. 065g 9 volts 9 volts 3. In the electrolysis of an aqueous solution of potassium iodide, I - ions are oxidized at the anode preferentially to water molecules. An alloy is a mixture of two elements, one of which is a metal. [CoCl 2- 4] + 6H 2 O [Co(H 2 O) 6]2+ + 4Cl - bluepink 2-(i) A student adds water to a blue solution containing [CoCl 4] ions. In copper electrolysis, when a current is applied, positively-charged copper ions (called cations) leave the anode (positive electrode) and move toward the cathode (negative electrode). In the present process the constituent steps, the oxidation of chloride to chlorate, and the oxidation of chlorate in the presence of sodium. By ionic theory, the solution ionizes thus:CuSO 4 (aq) → Cu 2+ (aq) + SO 42- (aq) (strong electrolyte) During electrolysis, Cu 2+ and H + ions move to the cathode while SO 42- and OH - ions move to the anode. 2 CuCl 2 → 2 CuCl + Cl 2. 4H 2 O(R) + 4e-62H 2 (g) + 4OH-(aq), EE-0. It is green when hydrated. The volume of chlorine liberated at the anode will be The volume of chlorine liberated at the anode will be. Because the salt has been heated until it melts, the Na + ions flow toward the negative electrode and the Cl - ions flow toward the positive electrode. Electrolysis of Aqueous Sodium Chloride: (The overpotential or overvoltage problem) When we electrolyze a sodium chloride solution, we see that water is reduced to hydrogen at the cathode exactly as we had (above) for the case of NaF electrolysis. Electrolysis of aqueous solution. Instead of the starting densely packed Cu NPs (×22. The Reaction of Aluminum to Copper in Electrolysis Electrolysis involves the manipulation of chemical reactions based on their electric potential. There are not many salts that electrolyse in aqueous solution to produce the metal from the cation and the element from the anion as here. - Concentrated aqueous sodium chloride, using inert electrodes. This experiment has significant implications in terms of what these 2 gases can be used for in their own right, with hydrogen being one of the cleanest sources of energy we have access to. There is competition. The solution may be represented by K^+(aq) and Cl^(-)(aq) At the positive electrode (anode) the following happens: Cl^- ->Cl+e^- 2Cl->Cl_2(g) At the other side (cathode): K^+ +e^(-) ->K K+H_2O->K^+ +OH^- +H 2H->H_2(g) So the net result is that at the anode chlorine gas is released, at the cathode hydrogen. Often you cannot separate a metal from its ore by breaking the ore into smaller pieces. Safety Precautions in Electrolysis. Mini Electrolysis of Sodium Sulphate(VI)(aq) and Micro Electrolysis of Copper(II) Chloride(aq) Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending! Tweet Share. Credits: Design, Text, and Demonstration. At the cathode sodium ions are converted to sodium metal. These are types of reactions, where there is an exchange of ions between the reactants. Touch the bottom of the test tube to check for temperature changes. There are indirect and rarely used means of using copper ions in solution to form copper(II) chloride. Electrolysis of concentrated sodium chloride solution using graphite electrodes Reactions Anode(+) Oxidation 2Cl-(aq) --> Cl2(g) +2e-Discharged Cl-(aq) (high concentration). Electrolysis of aqueous solution is different from electrolysis of molten electrolyte because. Figure 2: Microscale electrolysis of copper(II) chloride solution, before (left) and after (middle). Unit C2, C2. Graduated cylinder. The lessons include: 1. Therefore, they displace copper in the above reactions. Good job in your flashcards, just to point out: the products of the electrolysis of sodium chloride is sodium and chlorine gas and not chloride. copper(ii) chloride is a readily available form of copper in feeding trials which compares favorably with copper sulfate in cattle and swine trials. If you seperated a magnesium sulfate solution through electrolysis with a copper anode you would in return get a copper sulfate solution and a magnesium hydroxide precipitate MgSO4 (aq) + 2 H2O + Cu (s) → H2 (g) + Mg (OH)2 (s) + CuSO4 (aq) But do you think if i soaked wood pulp in the seperated copper sulfate solution then compressed. Place your piece of aluminum foil into your beaker and let it sit for at least 3 minutes. Copper (II) chloride is light brown when anhydrous. Electrolysis of Aqueous Sodium Chloride: (The overpotential or overvoltage problem) When we electrolyze a sodium chloride solution, we see that water is reduced to hydrogen at the cathode exactly as we had (above) for the case of NaF electrolysis. 8 Sample Data and Results of Calculations of a Copper-Zinc Electrolysis Cell. (aa) Excess chlorine gas is passed over hot iron filings. Sodium chloride is an inorganic chloride salt having sodium (1+) as the counterion. 2g Ending mass of Lithium chloride: 0. Impure samples appear green due to the presence of copper(II) chloride (CuCl 2). First Demonstration Second Demonstration 2. Add the 1 M copper chloride solution to one beaker. The copper halide solution contained 42. Electrolysis of copper(II) chloride solution. Add 1 M CuSO 4. Strontium was first isolated by Sir Humphry Davy, an English chemist, in 1808 through the electrolysis of a mixture of strontium chloride (SrCl 2) and mercuric oxide (HgO). Look at the examples above. In the electrolysis of lead(II) bromide, lead (a metal) was formed at the cathode and bromide (a non-metal) was formed at the anode. (c) sonal brushes her teeth with the best quality toothpaste everyday. Describe the electrolysis of copper sulfate solution using Copper electrodes. It decomposes to CuCl and Cl 2 at 1000 °C:. This reaction takes place in a unit called an electrolyzer. Sodium chloride is an inorganic chloride salt having sodium (1+) as the counterion. (i) Write an ionic equation for the reaction at the negative electrode. The electrolysis will only take place when electricity is passed through the copper chloride (CuCl 2) solution. The negative electrode is called cathode. Topic outline (Key stage target) Students should understand what happens during electrolysis and be able to relate this to the electrolysis of aqueous sodium hydroxide or dilute sulphuric acid. Regeneration by Membrane Electrolysis of an Etching Solution Based on Copper Chloride. Electrolysis of Molten Sodium Chloride Electrolysis of the ionic compound Sodium Chloride is commonly carried out to obtain Sodium metal. Electrolysis of aqueous sodium chloride yields hydrogen and chlorine, with aqueous sodium hydroxide remaining in solution. So the hydrogen gaining oxygen is oxidised. Copper chloride solution will ionize giving. Copper chloride must be a compound because when electrolysis caused a chemical. Water redox processes. As CuSO 4 is an electrolyte, it splits into Cu + + (cation) and SO 4 − − (anion) ions and move freely in the solution. They use chalk as the model for masonry, copper(II) chloride solution as a model for soluble copper and a freshly prepared slurry of copper phosphate as a model for a hard stain of copper on masonry. After the lab was. 1 decade ago. Be sure to record your observations of this instructor-led demonstration. Unit C2, C2. The products of the electrolysis reaction are tin(0) and tin(IV) chloride. Hazards of Copper Sulfate. Analysing the Electrolysis of Aqueous Solutions An aqueous solution of a compound is a solution produced when the compound is dissolved in water. Cl-, OH- Electrolysis of copper(II) nitrate solution, Cu(NO 3). electrolysis o f water Water is a weak electrolyte because it conducts very little amount of electric current. Introduction to electrolysis. Place the thermometer in the copper(II) chloride solution and record the temperature. (no rating) 0 customer reviews. Procedure: 1. I assume you are referring to the electrolysis of copper (II) sulfate with copper electrodes. copper wire aqueous sodium chloride molten sodium chloride The diagram shows the electrolysis of aqueous copper( II) sulphate using copper. Copper chloride Aqueous solution Copper Chlorine Potassium bromide Molten Potassium Bromine Use the table above to name the products formed at each electrode if using an aqueous solution of potassium bromide. Shiny pink metal. I assume you are referring to the electrolysis of copper (II) sulfate with copper electrodes. - Aqueous copper(II) sulphate using carbon electrodes - Aqueous copper (II) sulphate using copper electrode ÿPredict the likely products of the electrolysis of a molten compoundor of an aqueous solution. Effective catalyst for the tetrahydropyranylation of alcohols, using mild conditions and in high yields. Reduce copper oxide with natural gas, methane: 16. Video transcript When those two electrons reach our copper electrode, we know we have copper two plus ions in solution. Since sodium is more reactive than hydrogen, the H + ions will be discharged at the cathode and hydrogen gas will evolve. dry copper (II) chloride. 2 (b) The standard electrode potentials for three electrode systems are given below. 34 g of copper. Clean the copper electrodes until they shine. This investigation will examine one of the factors that affect the amount off copper deposited during the electrolysis of copper (II) sulphate solution. Describe the electrolysis of copper sulfate solution using Copper electrodes. In this lesson, learn about how electrolysis works and a few applications of electrolysis. 2H+ (a q) + 2e- H 2 (g ) In aqueous solutions where the metal has a more positive E°value than hydrogen in the electrochemical series (e. Record observations about the piece of aluminum foil. To convert copper(II) chloride to copper(I) derivatives, it can be convenient to reduce an. Therefore, they displace copper in the above reactions. Topic outline (Key stage target) Students should understand what happens during electrolysis and be able to relate this to the electrolysis of aqueous sodium hydroxide or dilute sulphuric acid. Some areas of the ocean are saltier than others. Electricity and chemistry Core • Define electrolysis as the breakdown of an ionic compound, molten or in aqueous solution, by the passage of electricity • Describe the electrode products and the observations made during the electrolysis of: – molten lead(II) bromide – concentrated hydrochloric acid – concentrated aqueous sodium chloride – dilute sulfuric acid between inert. The cathode, the surface layer near the edges of the electrode was removed to make it shiny. Out-of-sight, out-of-mind. Put approximately 25 mL of water into a beaker. The products are easy to show and the sum equation of the reaction is simple. € Hydrogen chloride has a high melting point. 3 Variables 6 (a) Manipulated variable: Concentration of ions in Figure 6. 7 Electrochemical cells such as motor car batteries with plastic casings can harm the environment if not disposed of safely. The electrolysis of copper sulfate solution (CuSO 4 (aq)) Copper sulfate solution is composed of copper ions (Cu 2+), sulfate ions (SO 4 2-), hydrogen ions (H +) and hydroxide ions (OH –). Then using indicators you will determine the products formed at the anode and the cathode during several different electrolysis experiments. Explain the results of the litmus paper test on the gas produced at the anode during the electrolysis of sodium chloride. 1 M copper sulfate and 0. Electrolysis of water is its decomposition to give hydrogen and oxygen gases due to the passage of an electric current. How to Prevent Corrosion of Copper Tube in Underground or Buried Applications. When zinc is added to hydrochloric acid, hydrogen gas will be released a solid, zinc chloride, will be formed. At the cathode, water is reduced: Figure \(\PageIndex{1}\) Diaphragm or Hooker cell for electrolysis I of brine (schematic). Aluminum foil. It reacts with aluminium foil to make hydrogen. The diagram shows the electrolysis of lead(II) bromide using inert electrodes. [CoCl 2- 4] + 6H 2 O [Co(H 2 O) 6]2+ + 4Cl - bluepink 2-(i) A student adds water to a blue solution containing [CoCl 4] ions. ), cupric chloride + hydrochloric acid is an excellent PCB (printed circuit board) etching solution. Two possible equations for this reaction are A CuSO 4 + Fe o Cu + FeSO 4 B 3CuSO 4 + 2Fe o 3Cu + Fe 2(SO 4) 3 It was found that 10. For example, if you heat sodium chloride until it melts, it is called molten sodium chloride, but if you dissolve sodium chloride in water, it is called aqueous sodium chloride. Copper Copper (II) sulfate. 83 V versus Na +(aq) + e-6Na(s), EE-2. The sulphate ions remain in solution. During electrolysis of Copper (II) Chloride, metal ions change from being soluble in the solution to insoluble at the surface of the cathode because metals are no soluble in water ; gains two electrons. Salt is made up of sodium and chloride and is ionically bonded. 635 g of copper at the cathode during the electrolysis of copper(II) sulphate solution if you use a current of 0. Procedure: 1. electrolysis is the process of splitting a compound by passing electricity. dry copper (II) chloride. Electrolysis is used in the production of copper metal, because the electric current is used to refine the copper and remove any impurities, without melting the ore, which uses a lot more energy. In both the mercury (II) oxide and copper (II) carbonate reactions, a gas. We are going to study the electrolysis of some electrolytes such as dilute tetraoxosulphate (VI) acid, dilute sodium chloride, concentrated sodium chloride, copper (II) tetraoxosulphate (VI) solution etc. That means that how much the anode has lost the cathode should have gained. copper oxide + sulphuric acid copper sulphate + water Write down everything that the word equation tells you about the reaction. Addition of soluble iodide to an aqueous solution of copper(II) ions results in the formation of a copper(I) iodide precipitate, which rapidly decomposes. Copper sulphate solution contains Cu2+ ions and SO/ – ions together with H + and OH – ions from the water. Hypothesis Ions of higher concentration will be selectively discharged during electrolysis. Video transcript When those two electrons reach our copper electrode, we know we have copper two plus ions in solution. Four processes using electrolysis are listed. Driving cars using water. Clean a small piece of copper wire with sandpaper, coil it, and drop it into a small test tube. The electrolysis of sodium chloride solution is an industrial process. A solution of sodium chloride in water contains:. Using pencil leads as electrodes it is possible to carry out electrolysis experiments at school on a very small scale or micro-scale. Electrolyte: Silver nitrate solution. Example: If mass decreases then the only possibility is that copper (reactant)---> something less than copper (product); logically that is not possible because copper is an element and is not decomposed in normal chemical reactions. I know this site is about Al but I guess that you must also know a lot of thing about. What observations will be seen when electrolysis of sodium chloride is done? Steve S. copper hydroxide, Cu(OH)2, or copper hydroxy carbonate or copper hydroxy sulphate. The extraction of copper from copper ore is done by reduction with carbon. It also contains chloride ions. State two appropriate observations for the above electrolysis reaction. The ion-selective membrane (B) allows the counterion Na+ to freely flow across, but prevents anions such as hydroxide (OH-) and chloride from diffusing across. Electro refers to energy and electricity and - lysis refers to splitting apart. Please help. ) what happens when aqueous ammonia was added into copper (2) chloride solution? as in the entire process of the reaction?. During electrolysis, copper. In the word equation hydrogen + oxygen → water, hydrogen is a [reactant, product], and water is a [reactant, product]. Cu2+ (a q )+ 2e- Cu (s ). Electrolysis has many practical and industrial applications. A cheaper alternative to the copper sulfate solution is a 50:50 mixture of 0. (i) Which electrode to your left or right is known as the oxidising electrode and why? (ii) Write the equation representing the reaction that occurs. The electrolysis of zinc chloride should be carried out in a fume cupboard. Meditative Mind 10,772,932 views. You can investigate the amount of Sources of Information. Clean a small strip of copper with steel wool. What is the oxidation number of magnesium before and. Electrolysis of Potassium Iodide continued 4 2016 linn cientific Inc ll Rihts Resered Electrolysis Reactions Data Table Electrolyte (Salt Solution) Observations Anode Cathode Potassium Iodide Sodium Chloride Copper(II) Bromide Post-Lab Questions 1. Task 4: Electrolysis Variables - Concentration. Electrolysis Copper Sulphate Solution. electrolysis. (b) the rain water mixing with river water was found to be having pH less than 7. Electrolysis of aqueous solution. In the Copper Lab, and based on the Law of Conservation of Mass, the amount of copper obtained at the end of the experiment should be [less than, equal to, greater than] the amount of copper at the beginning of the lab. 1 the electrolysis of concentrated aqueous sodium chloride 2 the electrolysis of dilute sulfuric acid. Electrolysis of 0. Observations Element formed Observations Element formed Copper (II) chloride. Tes Global Ltd is registered in England (Company No 02017289) with its registered office at 26 Red Lion Square London WC1R 4HQ. ) what happens when aqueous ammonia was added into copper (2) chloride solution? as in the entire process of the reaction?. You can investigate the amount of Sources of Information. Violet colour at anode is due to iodine. We are going to look carefully at what happens with two liquids, water and copper sulphate, but first the general ideas. Extraction of Metals. Add 1 M copper chloride to the beaker with the carbon electrodes. Answer: During electrolysis of aqueous copper sulphate using copper electrodes, the two anions OH –. Sign up now & start learning core GCSE & A-Level subjects in an easy way. Electrolysis is also used in electroplating. The Reaction of Aluminum to Copper in Electrolysis Electrolysis involves the manipulation of chemical reactions based on their electric potential. John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex, PO19. 5% (A) and electrolysis of CO2 in 50 mL NaHCO3 0. copper(II) chloride dihydrate, CuCl 2 • 2H 2 O aluminum foil, 8cm x 8cm additional chemicals for step 5 System Observations dry copper(II) chloride dihydrate copper(II) chloride in water stirred copper(II) chloride. electrolysis of copper chloride electrolysis o f water specific heat latent heat of fusion latent heat of vaporization heavy water. However, in electrolysis of a solution the two ions from the slight dissociation of every 6 X 10 9 water molecules are also present. Electrolysis is used in the production of copper metal, because the electric current is used to refine the copper and remove any impurities, without melting the ore, which uses a lot more energy. Explain this observation by referring to the concentration of the electrolytes. Electrolyte: Silver nitrate solution. OH-loses electrons at anode to become O 2 and H 2 O. Draw two sketches representing your observations during the first and second parts of this demonstration. 963Hz + 852Hz + 639Hz | Miracle Tones | Activate Pineal Gland | Open Third Eye | Heal Heart Chakra - Duration: 1:11:11. 2 mol dm-3 copper Electrolysis (Types of electrodes) Electrolysis of 1. Here, anion exchange membrane electrolysis was provided to separate copper from solution by controlling the cell voltage. This form of corrosion is related to the magnitude and direction of direct currents flowing in the earth through paths other than those intended. Add copper (II) chloride to the water, and stir. Copper chloride solution will ionize giving. electrolysis is the process of splitting a compound by passing electricity. List at least two observations that indicate a chemical reaction is occurring. The electrolytic decomposition of water. The stark contrast between the two colors makes it a popular chemical for detecting moisture, as any presence of water will be clearly marked. Electrorefining of Copper 1. You can not dispose of copper chloride down the drain!!!. Through this process we covered the copper spoon with silver chloride metal to increase its value, life span. H+ (aq) how is the answer O2 and H2SO3? asked by Sara on June 16, 2015; Chemistry. cation, which is attracted to the. At cathode _____ At anode _____ _____ (2) (c)€€€€€Explain why copper is formed at the cathode during the electrolysis of its salts. Overall equation for the electrolysis of hydrochloric acid: 2HCl (aq) ==> H2(g) + Cl2(g) This could be written more accurately as an ionic equation: 2H+(aq) + 2Cl-(aq) ==> H2(g) + Cl2(g) Extra COMMENTS on the electrolysis of hydrochloric chloride solution. Cut & Stick diagram of electrolysis of copper chloride solution. 4 Reduce copper (I) oxide (copper oxide) to copper: 10. Electrolysis of copper (II) chloride is a basic experiment in school chemistry. € Hydrogen chloride does not conduct electricity. Electrolysis of sodium chloride solution with inert electrodes can be done in several different ways, producing different sets of products. The copper metal was filtered, washed with distilled water, dried, and weighed; three separate determinations were performed. Place one of the paper disks in the test tube and use the stirring rod to push it flat against the copper(II) sulfate. 2g Ending mass of Lithium chloride: 0. There is competition. Electrolysis occurs when two dissimilar metals that make up a home's plumbing system are made to conduct this electricity. 71 - Electrolysis of aqueous solutions Q871-01 Which statement is correct about the electrolysis of copper (II) sulphate solution using graphite electrodes? A. The student recorded the. Date posted: November 8, 2017. The formation of chlorine gas and pure copper is made clear. Sugar, on the other hand, is composed of carbon, oxygen, and hydrogen and has covalent bonds. Microscale Electrolysis of Copper Chloride. Effective catalyst for the tetrahydropyranylation of alcohols, using mild conditions and in high yields. Tear up the aluminum foil into tiny pieces. Electrolysis of Aqueous Solutions E values nature of the electrode concentration of the electrolyte electrolysis of water electrolysis of copper (II) sulphate electrolysis of aqueous sodium chloride cf molten electrolytes where cations go to the cathode and anions go to the anode aqueous solution, there are more than one type of ion. The electrolytic decomposition of water. Electrolysis is the passing of a direct electric current through an ionic substance that is either molten or dissolved in a suitable solvent, producing chemical reactions at the electrodes and decomposition of the materials. glass jar; 2 paper clips; 6-V battery. Impurities are left on the anode, which will then fall off to collect below the anode. Right: a close up of the copper metal deposited on the carbon fibre negative electrode. 6 LE 2018 06204318 (e) When cobalt(II) chloride is added to water an equilibrium is established. The electrolytic cell C contains sugar solution and the bulb does not glow. 0 for unreacted chalcopyrite. With inert electrodes (silver, platinum, glassy carbon), you will produce hydrogen gas at the cathode,. Copper is a trace element essential to all species 16 – 17. moomoomath. Include cell diagram, observations, anode and cathode reactions and state the uses. 6 H 2 O (l) → 2 H 2 (g) + O 2 (g) + 4 H + (aq) + 4 OH-(aq). Emphasize the observations of a new product being formed on the surface of the copper wool. In the present process the constituent steps, the oxidation of chloride to chlorate, and the oxidation of chlorate in the presence of sodium. 1 M copper sulfate and 0. Explain the observation in eachTormation. Double Displacement Reaction. Voltage measured after 20 minutes = 0. Notify teacher of any accidents immediately. € Hydrogen chloride is made of simple molecules. - Zinc is thus oxidised to zinc ions, while copper (II) ions are reduced to copper atoms. Which observations will be made? at the positive electrode electrolyte at the negative electrode The diagram shows the electrolysis of aqueous sodium chloride and of molten sodium chloride. Electrolysis of aqueous NaCl results in hydrogen and chloride gas. 963Hz + 852Hz + 639Hz | Miracle Tones | Activate Pineal Gland | Open Third Eye | Heal Heart Chakra - Duration: 1:11:11. In this lesson, learn about how electrolysis works and a few applications of electrolysis. However, in some experiments the electrodes do take part in the reactions. Electrolysis of copper sulphate solution using copper electrodes. Element X is extracted by the electrolysis of a molten compound of elements X and Y. Tests for the gases formed in the electrolysis of sodium chloride solution. 0 M CuSO4(aq) are connected to a D. Copper chloride solution the electrolysis of copper chloride solution leads to the deposition of metallic copper at the cathode and the formation of chlorine gas at the anode. There are a couple different things that could form and cause an explosion, poison you, or both. 5 loading, Fig. Sodium sulfate salt or sulfuric acid needs to be added to the water first. This short video clip shows the electrolysis of copper(II) sulfate solution using graphite electrodes. Copper can be extracted from its ore by heating it with carbon. For example, if you heat sodium chloride until it melts, it is called molten sodium chloride, but if you dissolve sodium chloride in water, it is called aqueous sodium chloride. Electrolysis with different substances Example 2: Copper (II) chloride solution in water (where the electrodes are inert) If you are asked about the electrolysis of this solution in an exam you would not be expected to know the details of the shell arrangement for the element copper (because we only need the first 20 elements). State two appropriate observations for the above electrolysis reaction. Clean a small strip of copper with steel wool. The products of electrolysing copper sulfate solution with inert electrodes (carbon/graphite or platinum) are copper metal and oxygen gas. 2 (b) The standard electrode potentials for three electrode systems are given below. 2 M sodium chloride. A gas is produced and the solution becomes very warm. Attach wire to the object. Unpause the model. 4 the purification of copper using aqueous copper(II) sulfate. copper oxide + sulphuric acid copper sulphate + water Write down everything that the word equation tells you about the reaction. This time you can't start by working out the number of coulombs, because you don't know the time. Author: Created by simondobbs. Observations accept most responses. Regeneration by Membrane Electrolysis of an Etching Solution Based on Copper Chloride. The electrolyte consists of an acidic solution of CuSO 4. The copper (II) oxide is reduced to red/brown copper. (v)€€€€Why is hydrogen chloride a gas at room temperature (20 °C)? € € Tick ( ) two boxes. Take a 100 ml beaker and fill ¼ of it with water. Describe crystals in detail, and write down all of the observations. Record observations in your data table. Copper oxide dissolves in acid, regenerating the copper (II) ion, which once again binds to water. 2K subscribers.

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