Question

How copper is refined by electrolytic method.Exolain it with necessary reaction?

Answer 1

ELECTROREFINING OF COPPER

electrolyte: saturated aq. copper sulphate solution acidified

electrodes:

anode- impure copper rods

cathode- pure copper rod

electrolytic dissociation reaction:

CuSO4 -------Cu2+   +     SO42-

H2SO4-------  2H    +  SO42-

H2O------- H    +    OH-

Reaction at cathode:

Cu2+     +   2e-    ----->     Cu

Reaction at anode:

Cu  --  2e-    ------->     Cu2+