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The standard reduction potential for Fe^...

The standard reduction potential for `Fe^(2+) //Fe` and `Sn^(2+) //Sn` electrodes are `-0.44` and `-0.14 ` volt respectively. For the given cell reaction `Fe^(2+) + Sn rarr Fe + Sn^(2+) `, the standard ` EMF` is.

A

`+ 0.30 V`

B

`- 0.58` V

C

`+0.58` V

D

`-0.30 V`

Text Solution

Verified by Experts

The correct Answer is:
D
`Fe^(2+) +2e^(-) to Fe`
`Sn to Sn^(2+) + 2e^(-)`
`therefore E_("cell")=E_(Fe^(2+)//Fe)+E_(Sn//Sn^(2+))`
`=E_(Fe^(2+)//Fe)-E_(Sn^(2+)//Sn)`
`=-0.44+0.14=-0.30 V`
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DINESH PUBLICATION-NUCLEAR AND RADIO CHEMISTRY-Unit Test 4
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