Q48Short answer
Write the cell reaction of a lead storage battery when it is discharged. How does the density of the electrolyte change when the battery is discharged?
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Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O Density of electrolyte decreases as water is formed and sulphuric acid is consumed as the product during discharge of the battery.