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The standard emf of the cell, Ni|Ni^(2+)...

The standard emf of the cell, `Ni|Ni^(2+)(1.0M)||Ag^(+)(1.0M)|Ag [E^(@)` for `Ni^(2+)//Ni =- 0.25` volt, `E^(@)` for `Ag^(+)//Ag = 0.80` volt]

A

`-0.25+0.80=0.55`Volt

B

`-0.25-(+0.80)=-1.05`volt

C

`0+0.80-(-0.25)=+1.05` volt

D

`-0.80-(-0.25)=-0.55`volt

Text Solution

Verified by Experts

The correct Answer is:
C
`E_(cell)=E_(Ni//Ni^(2+))^(@)+E_(Ag^(+))//Ag)^(@)`
`=0.25+0.80=1.05"volt"`
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