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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