Question

A battery jar contained a solution of copper sulfate. Two electrodes. one made of copper the other a metal object to be copper plated, were placed in the jar and connected to a source of direct current. Which of the following statements concerning this system is correct?

• A. The object to be placed is the anode
• B. Oxidation occurs at the anode
• C. The sulfate ions migrate toward the cathode
• D. The concentration of the copper sulfate solution increases as electrolysis proceeds
• E. The copper electrode increases in mass.

Answer 1

The correct option is B Oxidation occurs at the anode

In electrolytic cell, for $C{u}^{2+}$ ions to get deposited at metal, metal sould have negative charge, i.e. it should act as cathode. Oxidation always occurs at anode. Sulphate ions will migrate towards anode as anode will have positive charge. Concentration of $CuS{O}_4$ decreases as electrolysis proceeds and the copper electrode decreases in mass.