Explain Electrolytic refining of a metal.
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Electrolytic refining: It is the process of refining of metal in which impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of metal salt is used as an electrolyte. When electric current is passed through the electrolyte, the impure metal from the anode is dissolved in the electrolyte and an equal amount of pure metal from the electrolyte is deposited on the cathode. The soluble impurities go into the solution whereas the insoluble impurities settle down at the bottom of the anode which is known as anode mud.
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ELECTROLYTIC REFINING IS THE PROCESS OF REFINING A METAL BY THE ELECTROLYSIS OF A SOLUTION OF THE SALT OF THE METAL ,USING A SMALL PIECE OF PURE METAL AS THE NEGATIVE ELECTRODE AND THE IMPURE METAL AS THE POSITIVE ELECTRODE.COPPER CAN BE REFINED THROUGH THIS METHOD.