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Question

A certain amount of charge is passed through acidulated water. A total of 504 mL of hydrogen and oxygen were collected at STP. Find the magnitude of charge that is passed during electrolysis in coulombs.

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Solution

Since upon electrolysis 168 ml of O2 and 336 ml H2 was produced because volume of H2 is double of O2 in electrolysis.
H2OH2+12O2 (nf=2)
So 2 faraday is required for 22.4 litre of H2 liberation
hence for (168×2) ml (2×33622400)=0.03 Faraday

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