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[Cr(2)O(7)^(-2)(x)/(r)2CrO(4)^(-2),X" an...

[Cr_(2)O_(7)^(-2)(x)/(r)2CrO_(4)^(-2),X" and "Y],[" respectively :- "]

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

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

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

The [CrO_(4)^(2-)] ions are equilibrium for the reaction, Cr_(2)O_(7)^(2-)+H_(2)Oharr2CrO_(4)^(2-)+2H^(+), "at" pH=4 is:

In acidic medium, H_(2)O_(2) changes Cr_(2)O_(7)^(2-) ion to CrO_(5) . The oxidation states of Cr in Cr_(2)O_(7)^(2-) and CrO_(5) are respectively :

[X]+H_(2)SO_(4) to [Y] a colourless gas with irritating smell, [Y]+K_(2)Cr_(2)O_(7)+H_(2)SO_(4) to green solution. [X] and [Y] are respectively :

[X]+H_(2)SO_(4) to [Y] a colourless gas with irritating smell, [Y]+K_(2)Cr_(2)O_(7)+H_(2)SO_(4) to green solution. [X] and [Y] are respectively :