# Electrolysis Driving Me Crazy!

Chemistry Level 2

The electrode reactions for the charging of a lead storage battery are:

$\ce{PbSO4 + 2 e- -> Pb + SO_4^2- }$ $\ce{PbSO4 + 2 H2O -> PbO2 + SO4^2- + 4H+ + 2e- }$

The electrolyte in the battery is an aqueous solution of sulphuric acid.Before charging,the specific gravity of liquid was found to be 1.11 (15.7% $$\ce{H2 SO4}$$ by weight).After charging for 100 hours,the sp.gravity was found to be 1.28 (36.9 % $$\ce{H2 SO4}$$ by wt.).

If the battery contained 2 litres of the liquid calculate the average current used for charging the battery.

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