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What volume of H(2) gas at STP will be e...

What volume of `H_(2)` gas at STP will be evolved when a current of 10 A is passed for 6 min 26 s through a dilute solution of `H_(2)SO_(4)`?

Text Solution

Verified by Experts

Quantity of electricity, `Q=10xx(6xx60+26)=3860C.`
`"96500 C electricity evolves 1g - eq or "(1)/(2)" mol of "H_(2)`
`"3860 C electricity will evolve "(1)/(2)xx(3860)/(96500)="0.02 mol of "H_(2)`
At STP, volume of 1 mol of `H_(2)=22.4L`
`"So, volume of 0.02 mol of "H_(2)=22.4xx0.02=0.448L="448 mL."`
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