Question

Electrolytic refining method for purification of metal. explain with figure​

Answer 1

Electrolytic refining of copper is an example of electrolytic refining.

The image consists of electrolytic tank with acidified copper sulphate as electrolyte. A thin strip of pure copper metal is used as cathode. A thick strip of impure copper metal is used as anode.

Following are the reactions that take place at cathode and anode respectively:

At cathode:

[latex]Cu^{2+}+2e^{-}\rightarrow Cu[/latex]

At anode:

[latex]Cu-2e^{-}\rightarrow Cu^{2+}[/latex]