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Standard electrode potential for Sn^(4+)...

Standard electrode potential for `Sn^(4+)//Sn^(2+)` couple is `0.15 V` and that for the `Cr^(3+)//Cr` couple is `-0.74 V`. These two couples in their standard state are connected to make a cell. The cell potential will be

A

`+0.89 V`

B

`+0.18 V`

C

`+1.83 V`

D

`+1.199 V`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `E_(Sn^(4+)//Sn^(2+))^(@)=+0.15V`
`E_(Cr^(3+)//Cr)^(@)=-0.74V`
`E_(cell)^(@)=E_("cathode (RP)")^(@)-E_("anode (RP)")^(@)`
`=0.15-(-0.74)`
`=+0.89 V`
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