Question

explain purification of copper with an activity?(diagram and equation with positive negative electrode needed)

Answer 1

Explanation:

In the purification of copper by electrolytic refining, the strip of impure copper metal is made the anode and a strip of pure copper metal is the cathode. A solution of copper sulphate is used as the electrolyte. When current is passed through the electrolyte, pure copper from the anode dissolves in the electrolyte. An equivalent amount of pure copper from the electrolyte is deposited on the cathode. The soluble impurities go into the solution, where as the insoluble impurities remain in the solution and are deposited at the bottom of anode as anode mud. 

 

 

Following reactions take place at anode and cathode

 Anode :  Cu  ---------> Cu+2 + 2e-

 cathode : Cu+2 + 2e- --------> Cu