ntsulphuric acid used in a lead storage batteryis 38%by mass and has a density of 1.30g/cm3. calculate its molarity.n

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Q. Sulphuric acid is used in lead-acid storage batteries.

Q. Equivalent mass of sulphuric acid in lead storage battery is:

Q. During the discharge of a lead storage battery the density of sulphuric acid fell from

1.294

1.139 {g mL}^{- 1}

H_{2} S O_{4}

of density

1.294 {g mL}^{- 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 the discharge. Calculate the number of Ampere hours for which the battery must have been used. The discharging reactions are:

P b + S O_{4}^{2 -} \to P b S O_{4} + 2 e^{-} (anode)

P b O_{2} + 4 H^{+} + S O_{4}^{2 -} + 2 e^{-} \to P b S O_{4} + 2 H_{2} O (cathode)

Q. During the discharge of a lead storage battery, the density of sulphuric acid fell from 1.294 to 1.139 g

m l^{- 1}

and sulphuric acid of the density of 1.294 g

m l^{- 1}

is 39% by mass and that of the density of 1.139 g

m l^{- 1}

is 20% by mass. The battery holds 3.5 litre of acid and the volume practically remained constant during the discharge. Calculate the no. of ampere hour for which the battery must have been used. The charging and discharging reactions are:

P b + S O_{4}^{2 -} \to P b S O_{4} + 2 e ⟹

charging

P b O_{2} + 4 H^{+} + S O_{4}^{2 -} + 2 e \to P b S O_{4} + 2 H_{2} O ⟹

discharging

During the discharge of a lead storage battery, the density of sulphuric acid fell from $1.294$ to $1.139$ gm $L^{- 1}$ . Sulphuric acid of density $1.294$ gm $L^{- 1}$ is $39$ % by weight and that of density 1.139 gm $L^{- 1}$ is $20$ % by weight. The battery holds $3.5$ litres of acid and the column practically remained constant during the discharge.

Calculate the number of ampere-hours for which the battery must have been used. The charging and discharging reactions are :

$P b + S O {_{4}}^{2 -} \to P b S O_{4} + 2 e^{-}$ (charging)

$P b O_{2} + 4 H^{+} + S O {_{4}}^{2 -} + 2 e^{-} \to P b S O_{4} + 2 H_{2} O$ (discharging)

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