Why the color of k2cr2o7 solution depends upon ph of the solution?
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The color change depends on the changes in the pH of the solution. Dichromate salts contain the dichromate anion, Cr2O72- and chromate salts contain chromate anion, CrO42−. ... When an alkali is added to an orange red solution of dichromate, an yellow solution is obtained due to the formation of chromate ions.
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