Question

If a solution of an electrolyte mixture has calcium ions, cupric ions, zinc ions and magnesium ions, which of these ions would you see preferentially discharged at the cathode?

Options

• Calcium ions

• Zinc ions

• Cupric ions

• Magnesium ions

Answer 1

Cupric ions

Explanation:

Among the given metal ions, copper is the least reactive and lies lowest in the electrochemical series. Therefore, Cu²⁺ ions are preferentially discharged at the cathode.