The electrolyte copper sulphate is to dissolve impure copper which produce Cu⁺² that migrate towards cathode and deposit over pure copper (cathode).

In this purification an anode made of impure copper is turned to pure copper at the cathode leaving the impurities behind (the sludge in the diagram). Anode reaction: Cu(s) → Cu 2+ (aq) + 2e-3. If the electrolyte is a dilute solution of silver sulfate, silver is formed at the cathode because it is less reactive than hydrogen and oxygen gas is formed at the anode. Summary Reactive metals (more reactive than hydrogen) are never deposited during electrolysis of aqueous solutions.

In the above process, after taking electrons the neutral copper atoms get deposited on the cathode. Therefore, the electrode at which oxygen gas is produced is an anode. If copper is used for the electrodes, the copper anode dissolves. SO 2-4, OH- ... What are cathode and anode products in electrolysis of a concentrated solution of silver nitrate. At the anode: No oxygen is produced, rather the copper anode dissolves. The electrolysis of copper(II) sulphate solution using carbon electrodes Copper is below hydrogen in the electrochemical series and so, using the summary above, you would predict that copper will be released at the cathode.

The solution or molten ionic compound is called an electrolyte. At the anode, we have a choice of sulphate or hydroxide ions, and hydroxide ions are easier to discharge so oxygen gas is given at the anode 4OH - (aq) + O 2 (g) ---> O 2 (g) + 2H 2 O (l) + 4e - At the cathode , we have a choice of copper or hydrogen ions. At the anode Oxygen is produced (from hydroxide ions), unless halide ions (chloride, bromide or iodide ions) are present.

And chlorine gas is formed at the anode because the solution is concentrated. At the same time, SO 4 reacts with copper anode and becomes CuSO 4 but in water it can not exist as single molecules instead of that CuSO 4 will split into Cu + +, SO 4 − − and dissolve in water. Ans: The electrolysis of aqueous copper sulphate is used for purification of impure copper. In the electrolysis of molten lead bromide, what elements are formed at the cathode and the anode Lead is formed at the cathode & bromine gas is formed at the anode The following ions are present in an aqueous solution of copper sulphate
Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. During electrolysis the impure copper is used as anode and pure copper is used as cathod . When Copper(II) sulfate is electrolysed with a copper anode electrode (the cathode can be carbon or copper), the copper deposit on the cathode (–) equals the copper dissolves at the anode (+). 2. 6. Bubbles of gas (oxygen) are formed at the anode. Anode (+) Cathode (-) Ion presents. Therefore the blue colour of the Cu 2+ ions stays constant because Cu deposited = Cu dissolved. Copper is purified by electrolysis. In electrolysis, cathode is a negative electrode and anode is a positive electrode.


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