write short notes on electrolytic refining of metal??
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Explanation:
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. ... 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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the crude metal is refined by electrolysis.it is carried out in an electrolytic cell containing aqueous solution of the salts of the metal of interest.rods of impure metal are used as anode and thin strips of pure metal is used as cathode the metal of interest dissolve from the anode ,pass into the solution while the same amount of metal ions from the solution will be deposited at the cathode.during electrolysis,the less electropositive impurities in anode,settle down at bottom are removed as anode mud eg.electrolytic refining of silver cathode :pure silver,anode:impure silver rods,electrolyte:acidified aqueous solution of silver nitrate