As we learnt in
Electrolytic Refining -
Many of the metals such as Cu,Au,Ag,Al,Hb etc are purified by this method.
The impure metal is made anode while a thin sheet of pure metal acts as a cathode.
In electrolytic refining of copper, electropositive impurities like Fe, Zn, etc dissolve in the solution and less electropositive impurities like Ag, Au, etc collect below the...