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The reduction potential of hydrogen half...

The reduction potential of hydrogen half cell will be negative if :

A

`P_(H_(2))=1 "atm" and [H^(+)]=1.0 M`

B

`P_(H_(2))=2 "atm" and [H^(+)]=2.0 M`

C

`P_(H_(2))=2 "atm" and [H^(+)]=1.0 M`

D

`P_(H_(2))=1 "atm" and [H^(+)]=2.0 M`

Text Solution

Verified by Experts

The correct Answer is:
C
`2H^(+)+2e^(-) to H_2`
`therefore RP=0.0-(0.059)/2 "log" (P_(H_2))/([H^+]^2)`
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The standard reduction potential for the half cell : NO_(3)^(c-)(aq)+2H^(c-) +e^(-) rarr NO_(2)(g)+H_(2)O is 0.78V . a. Calculate the reduction potential in 8M H^(o+) . b. What will be the reduction potential of the half cell in a neutral solution ? Assume all the other species to be at unit concentration.

Knowledge Check

  • The reduction potentail of hydrogen half -cell will be negative if :

    A
    `P(H_2) = 1 atm and [H^(+)] = 2.0 M`
    B
    `P (H_2) = 1atm and (H^(+) = 1.0| M`
    C
    `(PH_2) = 2atm and [H(+)] = 1.0M`
    D
    `P(H_2) = 2 atm and [H^(+)] = 2.0 M`

  • The reduction potential ofhydrogen half-cell will be negative if:

    A
    `p(H_(2))=1` atm and `[H^(+)]=2.0M`
    B
    `p(H_(2)) =1` atmand `[H^(+)] =1.01M`
    C
    `p (H_(2)) =2` atm and `[H^(2)]=1.0M`
    D
    `p(H_(3))=2` atm and `[H^(+)]=2.0M`

  • The production potential of hydrogen half-cell will be negative if:

    A
    `pH_(2) = 2 atm` and `[H^(+)] = 2.0 M`
    B
    `pH_(2) = 1 atm` and `[H^(+)] = 2.0 M`
    C
    `pH_(2) = 1 atm` and `[H^(+)] = 1.0 M`
    D
    `pH_(2) = 2atm` and `[H^(+)] = 1.0 M`
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