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Question

The emf of the following cell at 25oC.
Pt,H2P1=2atm,|HCl|Pt,H2P2=10atm
[Eocell=0.0v;2.303RTF=0.0591]

A
0.0206V
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B
0.0206V
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C
0.206V
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D
0.206V
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Solution

The correct option is D 0.0206V
The emf of the concentration cell is
E=0.05912logPanodePcathode
E=0.05912log(102)
E=0.05912log(5)=0.0206V

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