A car battery is a lead-acid battery. The reaction that occurs when the battery is recharging is a disproportionation reaction, meaning that the oxidizing agent and the reducing agent are the same species. The unbalanced equation for the reaction is: PbSO4(s) + H2O(1) PbO2(s) + Pb(s) + H2SO4(aq). the stoichiometric coefficient of H2SO4(aq) in the balanced equation with lowest integer coefficients for all species. 3. O1 O2 4

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