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Consider the following E^@ values . E^(...

Consider the following ` E^@` values . `E^(0)_((Fe^(3+)//Fe^(2+)) = + 0.77 V`,
`E_(Sn^(2+)//Sn)^@=- 15. V` The `E_(cell)^@` for the reaction ,
`Sn (s) + 2Fe_(aq)^(3+) rarr 2 Fe_(aq.)^(2+) + Sn_(aq.)^(2+)` is :

A

` 0.63 V`

B

`1. 40 V`

C

` 0. 91 V`

D

` 1. 668 V`

Text Solution

Verified by Experts

The correct Answer is:
C
`E_(cell)^@ =E(OPSn//Sn^(2+)) +E_(Fe^(2+)^@//Fe^(2+)`.
` =0.14 + 0.77 = 0. 91 V`.
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