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How K 2 Cr 2 O 7 + conc. H 2 SO 4 acts as an oxidising agent ?

How K2Cr2O+ conc. H2SOacts as an oxidising agent ?

Grade:12

1 Answers

Sakshi
askIITians Faculty 652 Points
8 years ago
The chromate and dichromate ions are fairly strong oxidizing agents. Commonly three electrons are added to a chromium atom, reducing it to oxidation state +3. In acid solution the aquated Cr3+ ion is produced.

Cr2O72 + 14 H3O+ + 6 e → 2 Cr3+ + 21 H2O (ε0 = 1.33 V)

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