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JAMB Chemistry 1994 Question 24

Question 24

Electrolysis

Crude copper could be purified by the electrolysis of concentrated copper (II) chloride if the crude copper is

  1. A.made both the anode and the cathode
  2. B.made the cathode
  3. C.made the anode
  4. D.dissolved in the solution
Show the answer and explanation

Answer: C (made the anode)

Explanation

The impure copper anode dissolves into the solution as Cu2+, and pure copper is deposited on the cathode. The impurities fall below the anode.