Can the reaction Cr2O72-+H2O⇌2CrO42-+2H+ be considered as a redox reaction

Dear student
Please find the solution to the asked query:

 
No, the reaction Cr₂O₇^2- +H₂O  -->  2CrO₄^2- + 2H⁺
cannot be considered as a redox reaction. In redox reactions one species undergoes oxidation and another undergoes reduction,
This is marked by the changes in oxidation state of the species.
The charge on Cr remains same in both the complexes.
In Cr₂O₇^2-, let Cr have a charge +x
then 2x -14=-2, 2x=12, x =+6
In CrO₄^2-, if Cr has a charge x, then x-8 =-2, x =+6

Also, H has +1 charge in both H₂O and H⁺ ion.
So it is not a redox reaction.

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