During the discharge of a lead storage battery, the density of sulphuric acid fell from 1.294 to 1.139 g.ml^(-1).H_(2)SO_(4) of density 1.294 gml^(-1) is 39% and that of density 1.139 g.ml^(-1) is 20% by weight. The battery holds 3.5 L of acid and the volume practically remains constant during discharge. Calcualte the number of ampere hours for which the battery must have been used. The discharging and charging reactions are: Pb + SO_(4)^(2-) rightarrow PbSO_(4) + 2e^(-) (Anodic reaction) PbO-92) + 4H^(+) + SO_(4)^(2-) + 2e^(-) rightarrow PbSo_94) + 2H_(2)O (Cathode reaction)

During the discharge of a lead storage battery, the density of sulphur

1.	During the discharge of a lead storage battery, the density of sulphuric acid fell from 1.294 to 1.139 g.ml^(-1).H_(2)SO_(4) of density 1.294 gml^(-1) is 39% and that of density 1.139 g.ml^(-1) is 20% by weight. The battery holds 3.5 L of acid and the volume practically remains constant during discharge. Calcualte the number of ampere hours for which the battery must have been used. The discharging and charging reactions are: Pb + SO_(4)^(2-) rightarrow PbSO_(4) + 2e^(-) (Anodic reaction) PbO-92) + 4H^(+) + SO_(4)^(2-) + 2e^(-) rightarrow PbSo_94) + 2H_(2)O (Cathode reaction)
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