Question

Write equations for the half-reactions that occur at the anode and cathode for the electrolysis of each of the following aqueous solutions: PbCl₂(aq)

a) Anode: Cl₂(g) + 2e⁻ → 2Cl⁻(aq); Cathode: Pb²+(aq) + 2e⁻ → Pb(s)
b) Anode: Pb(s) → Pb²+(aq) + 2e⁻; Cathode: 2H₂O(l) + 2e⁻ → H₂(g) + 2OH⁻(aq)
c) Anode: PbCl₂(aq) → Pb(s) + Cl₂(g); Cathode: 2H₂O(l) + 2e⁻ → H₂(g) + 2OH⁻(aq)
d) Anode: Pb(s) + Cl⁻(aq) → PbCl₂(s) + 2e⁻; Cathode: O₂(g) + 4H⁺(aq) + 4e⁻ → 2H₂O(l)