JAMB Chemistry 2024 Paper

Concept:In aqueous electrolytes, electrical conductance occurs through the movement of ions, not electrons.Explanation:When $\mathrm{CuSO}_4$ dissolves in water, it dissociates into $\mathrm{Cu}^{2+}$ and $\mathrm{SO}_4^{2-}$ ions.These ions become surrounded by water molecules, forming hydrated ions.The hydrated ions migrate toward the electrodes and carry electric current through the solution.Metallic conduction, involving mobile electrons, does not apply to an aqueous solution.Therefore, the charge carriers are the hydrated ions present in the solution.Answer:C. hydrated ions