10) commonly used in automobiles and
invertors It consists of a lead anode and a grid of lead packed with
lead dioxide (PbO2 ) as cathode A 38% solution of sulphuric acid
is used as an electrolyte The cell reactions when the battery is in use are given below:
Anode:
Pb(s) + SO4
2–(aq) ® PbSO4(s) + 2e–
Cathode:
PbO2(s) + SO4
2–(aq) + 4H+(aq) + 2e– ® PbSO4 (s) + 2H2O (l)
i