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The standard reduction potential for the...

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.

Text Solution

Verified by Experts

(i) Applying the formula,
`E_("red")=E_("red")^(@)+0.0591/n log [H^(+)]^(2)`
`=0.78+0.0591/2 log 8^(2)`
`=0.78+0.0591xx3xx0.3010`
`=0.833` volt
(ii) `E_("red")=0.78+0.0591/2 log (10^(-7))^(2)`
[For neutral solution `[H^(+)]=10^(-7) M`]
`=0.78-0.0591xx7`
`=0.367` volt
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