WAEC - Chemistry (2001 - No. 24)
In the electrolysis of CuSO4(aq) using copper electrodes, the reaction at the anode is
discharge of SO4 2-
discharge of OH-
dissolution of copper electrode
evolution of oxygen
Magyarázat
When copper electrodes are used to electrolyze an aqueous copper sulfate solution, the following happens at the anode:
- Copper loses electrons: Copper atoms at the anode lose electrons, forming copper ions that go into the solution.
- Anode dissolves: The anode slowly dissolves away as the electrolysis continues.
- Copper ions are generated: Copper ions are generated at the anode. In summary, there is dissolution of copper electrode - Option C