This method is based upon the
phenomenon of electrolysis. The crude metal is made anode whereas the thin
sheet of a pure metal is made cathode. The electrolyte is the solution of
soluble salt of the same metal, preferably a double salt on passing electricity
the metal from anode goes into solutions as ions due to oxidation while the
pure metal gets deposited at the cathode due to reduction of metal ions the
impurities settle down below the anode as Anode Mud.
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