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CBSE Class 10 Answered

Why does lmpure copper dissolve but not pure copper in acidified copper sulphate solution during electrolytic refining of copper
Asked by saradamahapatra9999 | 06 Dec, 2019, 10:06: AM
Expert Answer

 Electrolytic refining of copper:
 

In the process of electrolytic refining of copper, the electrolyte used is acidified copper sulphate.

Impure metal is made as an anode and pure metal is made as a cathode.

On passing the electric current through the electrolyte, the impure metal from anode dissolves into the electrolyte solution

and pure metal from copper sulphate solution deposits on the cathode.

 At Anode:  Cu → Cu2+  + 2e-

 

At Cathode: Cu2+  + 2e- → Cu

The soluble impurities go into the solution and insoluble impurities settle down at the bottom of an anode and are known as anode mud.

Answered by Ramandeep | 06 Dec, 2019, 10:56: AM
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