What is the chemical form of hexavalent chromium?

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Multiple Choice

What is the chemical form of hexavalent chromium?

Explanation:
Hexavalent means chromium is in the +6 oxidation state. The chemical form that reflects this oxidation state is Cr6+. In practice, hexavalent chromium appears in compounds like chromate (CrO4^2−) and dichromate (Cr2O7^2−), or as chromium trioxide (CrO3), all with chromium in the +6 state. The other options correspond to chromium in different states: Cr3+ is +3 (trivalent), Cr0 is elemental chromium, and Cr2+ is +2. So Cr6+ correctly represents hexavalent chromium.

Hexavalent means chromium is in the +6 oxidation state. The chemical form that reflects this oxidation state is Cr6+. In practice, hexavalent chromium appears in compounds like chromate (CrO4^2−) and dichromate (Cr2O7^2−), or as chromium trioxide (CrO3), all with chromium in the +6 state. The other options correspond to chromium in different states: Cr3+ is +3 (trivalent), Cr0 is elemental chromium, and Cr2+ is +2. So Cr6+ correctly represents hexavalent chromium.

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