Q. 134.1( 24 Votes )

Write the chemist

Answer :

Anode: Lead (Pb)


Cathode: a grid of lead packed with lead oxide (PbO2)


Electrolyte: 38% solution of sulphuric acid (H2SO4)


The cell reactions are as follows :


Pb (s) + SO2-4(aq) PbSO4(s) + 2e- (anode)


PbO2(s) + SO2-4(aq) + 4H+(aq) +2e- PbSO4(s) +2H2O(l) (cathode)


Pb(s) + PbO2(s) +2H2SO4(aq) 2PbSO4(s) +2H2O(l)


(overall cell reaction)


On charging, all these reactions will be reversed.


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