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At what concentration of [overset(c-)(O)...

At what concentration of `[overset(c-)(O)H]` does the following half reaction has a potential of `0V` when other species are at `1M ?`
`NO_(3)^(c-)+H_(2)O+2e^(-) rarr NO_(2)^(c-)+2overset(c-)(O)H,E^(c-)._(cell)=-0.06V`

A

`2.0M`

B

`1.0M`

C

`0.1M`

D

`0.01M`

Text Solution

Verified by Experts

The correct Answer is:
c
`E_(cell(red))=E^(c-)._(cell(red))-(0.059)/(2)log [overset(c-)(O)H]^(2)`
`=-0.06-0.059log[overset(c-)(O)H]=0`
`[overset(c-)(O)H]=0.14`
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