Overall reaction: Pb(s) + PbO2(s) + 2 H+(aq) + 2 HSO4-(aq) -> 2 PbSO4(s) + 2 H2O(l) Cathode half-cel — Electrochemistry Chemistry Question

Overall reaction: Pb(s) + PbO₂(s) + 2 H⁺(aq) + 2 HSO^4-(aq) → 2 PbSO₄(s) + 2 H₂O(l)
Cathode half-cell reaction: PbO₂(s) + 3 H⁺(aq) + HSO^4-(aq) + 2 e^- → PbSO₄(s) + 2 H₂O(l)

1. The equations above represent reactions associated with the operation of a lead storage battery. The first is the overall reaction that occurs as the battery produces an electrical current, and the second is the half-reaction that occurs at the cathode.