In an acidic solution, chromic acid, chromate and dichromate are three possible forms of which substance?

Prepare for the Physical Chemical Operator SC Test. Review with interactive questions, detailed explanations, and get insights into the exam format. Ensure your success!

Multiple Choice

In an acidic solution, chromic acid, chromate and dichromate are three possible forms of which substance?

Explanation:
In acidic solutions, chromium exists in the +6 oxidation state. The species chromic acid (H2CrO4), chromate (CrO4^2−), and dichromate (Cr2O7^2−) are simply different forms of chromium in this same oxidation state, Cr(VI), governed by the acid–base equilibria and proton concentration. They all come from chromium in hexavalent form, not from Cr(III), metallic chromium, or chromium oxide.

In acidic solutions, chromium exists in the +6 oxidation state. The species chromic acid (H2CrO4), chromate (CrO4^2−), and dichromate (Cr2O7^2−) are simply different forms of chromium in this same oxidation state, Cr(VI), governed by the acid–base equilibria and proton concentration. They all come from chromium in hexavalent form, not from Cr(III), metallic chromium, or chromium oxide.

Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy