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6.26 Outline the principles of refining of metals by the following methods : (ii)Electrolytic refining
Answers (1)
Electrolytic refining- It is a process of refining impure metals by electricity. In this method, impure metal is act as anode and the same pure metal strip is act as cathode. Same metal salt which is soluble is taken as the electrolyte. When electricity is passed the metal ions deposited at the cathode (pure metal) and the impure metal is starting dissolving in the solution in the form of ions. Impurities present in metal (impure metal) gets collected at bottom of the anode (as anode mud)
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