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Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with:

Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with:

Grade:9

1 Answers

Aarti Gupta
askIITians Faculty 300 Points
7 years ago
Potassium dichromate is an strong oxidising agent.It is used as a primary standard in volumetric analysis.
The oxidising action of potassium dichromate in acidic medium is given as-
Cr2O72- + 14H+ + 6e- ----------------> 2Cr3+ + 7H2O
It oxidises iron(II) salts to iron(III)
Cr2O72- + 14H+ + 6Fe2+ ---------------> 2Cr3+ + 6Fe3+ + 7H2O

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