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How K2Cr2O7 + conc. H2SO4 acts as an oxidising agent ?

Rounak Datta , 9 Years ago
Grade 12
anser 1 Answers
Sakshi

Last Activity: 9 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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