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An aqueous solution of Na(2)SO(4) was el...

An aqueous solution of `Na_(2)SO_(4)` was electrolysed for 10 min. 82 ml of a gas was produced at anode and collected over water at `27^(@)C` at a total pressure of 580 torr. Determine the current that was used in amp.
Given: Vapour pressure of `H_(2)O` at `27^(@)C = 10` torr
`R = 0.082 atm L//mol-K`
Write your answer excluding decimal places.

Text Solution

Verified by Experts

The correct Answer is:
1
An anode reaction will be
`2H_(2)O rarr O_(2) +4H^(+) +4e^(-)`
`Vo_(2)` collected `= 82 ml`
By `PV = nRT ((580 -10))/(760) xx (82)/(1000) = (n_(o_(2))) xx 0.0821 xx 300`
`(n_(o_(2)) =(1)/(400))`
By Faraday law `(W)/(E) = (i xx t)/(96500)`
`((W)/(M)) xx n = (ixxt)/(96500) ((1)/(400)xx4) = (ixx 10 xx 60)/(96500)`
`i= 1.6`
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