Refining of meatal by electrolytic refining

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 Electrolytic refining:


Metals having large positive electrode potential are purified by this method. The metals to be purified should have lower discharge potential than the impurities. For example, during the purification of Cu metal, impure metal is made anode, a piece of pure metal is made cathode and electrolysis is carried in an electrolytic bath containing acidified CuSO⁴ as electrolyte.

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