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

Consider the following `E^(@)` values `E^(@)(Fe^(3+)|Fe^(2+))=+0.77V,E^(@)(Sn^(2+)|Sn)=-0.14V` under standard conditions , the potemtial for the reaction : `Sn(s)+2Fe^(3+)(aq)to2Fe^(2+)(aq)+Sn^(2+)(aq)` is

A

0.19 V

B

0.140 V

C

1.68 V

D

0.63 V

Text Solution

Verified by Experts

The correct Answer is:
A
`E_("cell")^(@)=E^(@)(Fe^(3+)|Fe^(2+))-E^(@)(Sn^(2+)|Sn)`
`=0.77-(-0.14)=+0.91V`
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