When a lead storage battery is charged — Electrochemistry Chemistry Question

💡 Solution & Explanation

During the charging phase of a lead storage battery, the non-spontaneous reverse reaction is driven by an external source: $2PbSO_4 + 2H_2O \rightarrow Pb + PbO_2 + 2H_2SO_4$. This process regenerates sulphuric acid, increasing its concentration and the specific gravity of the electrolyte.