Question

Write the cell reactions which occur in lead storage battery when the battery is in use.

Write the anode and cathode reaction and the overall cell reaction occurring in a lead storage battery during its use.

Answer 1

At anode: \[\ce{Pb_{(s)} + SO^{2-}_{4 (aq)} -> PbSO4_{(s)} + 2e-}\]

At cathode: \[\ce{PbO2_{(s)} + SO^{2-}_{4 (aq)} + 4H+_{ (aq)} + 2e- -> PbSO4_{(s)} + 2H2O}\]

Overall cell reaction: \[\ce{Pb_{(s)} + PbO2_{(s)} + 4H{^{+}_{(aq)}} + 2SO^{2-}_{4} -> 2PbSO4_{(s)} + 2H2O}\]