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Cu^(2+)(aq.) is unstable in solution and...

`Cu^(2+)(aq.)` is unstable in solution and under goes simultaneous oxidation and reduction according to the reaction
`2Cu^(+)(aq.)hArr Cu^(2+)(aq.)+Cu(s)`
Choose the correct `E^(@)` for the above reaction if
`E_(Cu^(2+))^(@)//Cu = 0.34 V and E_(Cu^(2+))^(@)//Cu^(+) = 0.15 V`

A

`+0.49V`

B

`+0.38V`

C

`-0.19V`

D

`-0.38V`

Text Solution

Verified by Experts

The correct Answer is:
B
See A-Level information `E_(Cu^(+)//Cu)^(@)=2E_(Cu^(2+)Cu^(2+)//Cu)-E_(Cu^(2+)//C u)=2xx0.337V-0.153V`
`=0.674V-0.153V=0.521V`
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