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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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Knowledge Check

  • Cu^(+) (aq) is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction 2cu^(+)(Aq)rarrCu^(2+)(aq)+cu(s) choose correct E^(2) for above reaction if E_(Cu^(2+)//Cu)^(@) =0.34 V and E_+(Cu^(2+)//Cu^(+))^(2) =0.15 V

    A
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    B
    `+0.49 V`
    C
    `+0.38 V`
    D
    `-0.19 V`

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    A
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    B
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    A
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    B
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    C
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    D
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