Question

25. Draw a diagram of electrolytic refining of copper and label the electrode to which impure copper metal is
connected.
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Answer 1

Answer:

Anode- Impure Copper metal rod

Cathode- Pure Copper metal rod

Electrolyte- Acidified copper sulphate solution

Process of refining -On the application of high voltage the pure copper metal ions from the impure copper metal rod i.e. anode dissolves into the electrolyte and the same amount of Cu

2+

ion gets deposited over the cathode rod as shown in the diagram. Thus the impure metal can be refined by electrolytic method.

Answer 2

Here, Impure copper is taken as the anode and the pure copper as cathode. Copper sulphate solution is the electrolyte solution.