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If hydrogen electrodes dipped in two sol...

If hydrogen electrodes dipped in two solutions of `pH=3` and `pH=6` are connected by a salt bridge, the `EMF_(cell)` is

A

`0.052V`

B

`0.104V`

C

`0.177V`

D

`0.3V`

Text Solution

Verified by Experts

The correct Answer is:
C
For the given concentration cell `:`
`H_(2)|H^(o+)(c_(1))||H^(o+)(c_(2))|H_(2)`
`E_(cell)=-0.059(pH_(c)-pH_(a))`
`=-0.059(3-6)=0.1773V`
Cell will be feasible only when
`[c_(2)]_(c)gt[c_(1)]_(a)` or `pH_(c)ltpH_(a)`
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