General Principles And Processes of Isolation Of Elements

General Principles And Processes of Isolation Of Elements

Question

Explain the principle of the method of electrolytic refining of metals. Give one example.

Answer

Electrolytic refining; Electrolytic refining is the process of refining impure metals by using electricity. In this process, impure metal is made the anode and a strip of pure metal is made the cathode. A solution of a soluble salt of the same metal is taken as the electrolyte. When an electric current is passed, metal ions from the electrolyte are deposited at the cathode as a pure metal and the impure metal from the anode dissolves into the electrolyte in the form of ions. The impurities present in the impure metal gets collected below the anode. This is known as anode mud.

Copper refined by the electrolytic refining.

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