What is composition of charge in …

Blister copper consists of about 2% of impurities consisting of cliver, Glod, Zinc, Nicket etc. It is mostly purified by electrolytic method. A block of impure copper is anode, a strip of pure copper is cathode while solution of CuSO₄ containing dil H₂SO₄ is e;ectrolyte. On passing current, impure copper dissolves and equivalent amount of pure copper is deposited at cathode. Impurities are collected below anode as anode mud.

             CuSO₄ (aq)      →      Cu⁺⁺ + SO^—₄

            At cathode: Cu⁺⁺ + 2e   →     Cu

            At anode:        Cu         →      Cu^{++ + 2e}

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