Question

Explain " Electrolytic refining"?

Answer 1

Purification of materials bi electrolysis. It is commonly applied to copper. A large peace of impure copper is used as anode with a thin strip of pure copper as the cathode. Copper(II)sulphate solution is electrolyte.Copper dissolves at the anode: Cu = Cu2+ +2e, and is deposited at the cathode.

Answer 2

Hey !!

Question = Explain electrolytic refining ?

Answer = In this method, impure metal is made to act as anode. A strip of same metal in pure form is used as cathode. They are put in an electrolytic bath containing soluble salt of same metal. On passing electric current, metal ion from the electrolyte solution are deposited at the cathode in the form of metal while an equivalent amount of metal dissolves from the anode and goes into the electrolyte solution as metal ions

At cathode - Mⁿ⁺ (aq)  + ne⁻ ----> M(s)

At anode - M(s) ------> Mⁿ⁺(aq) + ne⁻

⁻The voltage applied for the electrolysis is such that the impurities of more electropositive metals remain in the solution as ions whereas impuritites of less electropositive metals settle down under the anode as anode mud. A large number of metals such as coper , gold , silver , zinc , aluminium etc are refined by this method.

Hope it helps you !!