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5 A current is passed for 5 min through ...

5 A current is passed for 5 min through acidified water at NTP, producing 175 mL `H_(2)` at the cathode. Find the electrochemical equivalent of `H_(2)` .

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`Q=5xx5xx60=1500C`.
`"At STP, 175 mL "H_(2)-=(2xx175)/(22400)-=0.01562g H_(2)`.
`W=ZxxQ` or, `0.0156=Zxx1500`
`therefore" "Z=1.04xx10^(-5)g.C^(-1)`
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