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Cu^(+) disproportionate to Cu^(2+) and e...

`Cu^(+)` disproportionate to `Cu^(2+)` and elemental copper in solution.

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Explore conceptually related problems

(a) Why are Zn^(2+) salts white while Cu^(2+) salts are blue ? (b) What is meant by 'disproportionation' ? Write the disproportionation reaction of Cu^+ in aqueous solution.

The reduction potential diagram (Latimer diagram) for Cu is acid solution Calculate x. Does Cu^(+) disproportionate in the solution?

Knowledge Check

  • Cu^(+) ion is not stable in aqueous solution because of disproportionation reaction. E^(@) value for disproportionation of Cu^(+) is (Given E_(Cu^(2+)//Cu^(+))^(@)=0.15,E_(Cr^(2+)//Cu)^(@)=0.34V )

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

  • Cu^(+) ion is not stable in aqueous solution because because of dispropotionation reaction. E^(@) value of disproportionation of Cu^(+) is [E_(Cu^(2+)//Cu^(+))^(@)=+ 0.15 V, E_(Cu^(2+)//Cu)^(@)=0.34 V]

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

  • Statement-1: Many copper (I) compound are unstable in aqueous solution and undergo disproportionation. Statement-2: Cu^(2+) I mre stable than Cu^(+) because of much more negative Delta_(hyd)H^(@) of Cu^(2+) than Cu^(+) , which more than compensates for seconds ionisation enthalpy.

    A
    Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1.
    B
    Statement-1 is true, statement-2 is true, statement-2 is NOT a correct explanation for statement-1
    C
    Statement-1 is true, statement-2 is false.
    D
    statement-1 is false, statement-2 is true.

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    The reduction potential diagram for Cu in acid solution is : Calculate X . Does Cu^(+) disproportionate in solution ?

    The oxidation state of Cu and Fe in copper pyrities is respectively:

    Assertion: Aquated copper(I) cation undergoes disproportionation as: 2Cu^(+)(aq) to Cu^(2+)(aq)+Cu Reason: Hydration energy of Cu^(2+) is higher than that of Cu^(+) which compensates second ionisation energy of Cu.

    Assertion: Aquated copper(I) cation undergoes disproportionation as: 2Cu^(+)(aq) to Cu^(2+)(aq)+Cu Reason: Hydration energy of Cu^(2+) is higher than that of Cu^(+) which compensates second ionisation energy of Cu.

    Assertion Cu^(o+) ion is unstable in aqueous solution, whereas Fe^(2+) ion is stable Cu^(o+) disproportionate in aqueous solution .

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