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CrO(4)^(2-)underset(pH=Y)overset(pH=X)(h...

`CrO_(4)^(2-)underset(pH=Y)overset(pH=X)(hArr)Cr_(2)O_(7)^(-2)` The pH values of (X) and (Y) are respectively

A

`6, 8`

B

`6, 5`

C

`8, 6`

D

`7, 7`

Text Solution

Verified by Experts

The correct Answer is:
A
`2CrO_(4)^(2-)+2H^(+) to Cr_(2)O_(7)^(2-)+H_(2)O`
`Cr_(2)O_(7)^(2-)+2OH^(-) to 2CrO_(4)^(2-)+H_(2)O`
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Knowledge Check

  • Cr_(2)O_(7)^(2-)underset(Y)overset(X)hArr X and Y are respectively:

    A
    `X=OH^(-),Y=H^(+)`
    B
    `X=H^(+),Y=OH^(-)`
    C
    `X=OH^(-),Y=H_(2)O_(2)`
    D
    `X=H_(2)O_(2),Y=OH^(-)`

  • Cr_(2)O_(7)^(2-)underset(Y)overset(X)hArr2CrO_(4)^(2-), X and Y are respectively.

    A
    `X=OH^(-),Y=H^(+)`
    B
    `X=H^(+),Y=OH^(-)`
    C
    `X=OH^(-),Y=H_(2)O_(2)`
    D
    `X=H_(2)O_(2),Y=OH^(-)`

  • Cr_(2)O_(7)^(2-)overset(pH=x)rarrCrO_(4)^(2-)overset(pH=y)rarrCr_(2)O_(7)^(2-) x and y can be :

    A
    4 and 5
    B
    4 and 8
    C
    8 and 4
    D
    8 and 9

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