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A Lead storage battery is the most important type of secondary cell having a lead anode and a grid of lead packed with PbO2 as cathode. A 38% solution of sulphuric acid is used as electrolyte. (Density=1.294 g mL-1) The battery holds 3.5 L of the acid. During the discharge of the battery, the density of H2SO4 falls to 1.139 g mL-1. (20% H2SO4 by mass)
Write the products of electrolysis when dilute sulphuric acid is electrolysed using Platinum electrodes.
When dilute sulphuric acid is electrolysed using platinum electrodes,
At the cathode, the following reduction reaction occurs to produce H2 gas.
At the anode, the following processes are possible.
So, the products obtained are-
(i) Hydrogen gas at cathode.
(ii) Oxygen gas at anode.
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