E-STAR - Student

1. During the electrolysis of an aqueous solution of CuSO₄ using platinum electrodes, the reaction that takes place at the anode is:

Cu²⁺ + 2e⁻ → Cu

Cu → Cu²⁺ + 2e⁻

2H₂O → 4H⁺ + O₂ + 4e⁻

4H⁺ + O₂ + 4e⁻ → H₂O