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Why K2Cr2O7 shows yellow colour............​???????????????

Why K2Cr2O7 shows yellow colour............​???????????????

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60787 Points
3 years ago
Answer:

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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