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The pressure of H(2) required to make th...

The pressure of `H_(2)` required to make the potential of `H_(2)` -electrode zero in pure water at `50^(@)`C is :-

A

`10^(-14)`

B

`10^(-7)`

C

`10^(+14)`

D

`10^(+7)`

Text Solution

Verified by Experts

The correct Answer is:
A
`2H^(+)(aq)+2e^(-)toH_(2)(g)`
`E=E^(@)-(2.303xx8.314xx323)/(2xx96500)"log"(P_(H2))/([H^(+)]^(2))`
`O=O-(2.303xx8.314xx323)/(2xx96500)"log"(P_(H2))/([H^(+)]^(2))`
`(P_(H2))/10^(-14)=1`
`pH_(2)=10^(-14)atm`
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