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

  • Cu_(aq)^+ is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction : 2Cu^+ (aq) iff Cu^(2+)(aq) + Cu(s) Choose correct E^@ for above reaction if E_(Cu)^(2+) = 0.34V and E_(Cu)^(2+) = 0.15V

    A
    –0.38 V
    B
    +0.49 V
    C
    +0.38 V
    D
    –0.19 V

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

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