Electrolysis and Storage Batteries
It is noticed that during discharging the following does not happen

the cell absorbs energy
specific gravity of H2SO4 decreases
voltage of the cell decreases
both anode and cathode become PbS04

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Electrolysis and Storage Batteries
In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3

4 parts of acid to 6 parts of water
6 parts of acid to 4 parts of water
4 parts of acid to 8 parts of water
4 parts of acid to 4 parts of water

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