The CrO 4 2- ion was involved in a chemical reaction, during which it is transformed into Cr 3+ ions. What is the change in oxidation number of the chromium atom?

The oxidation state of Cr in CrO₄²⁻ is +6. When it is reduced to Cr³⁺, the oxidation state becomes +3. Therefore, the oxidation number decreases by 3 units.

The CrO 4 2- ion was involved in a chemical reaction, during which it is transformed into Cr 3+ ions. What is the change in oxidation number of the chromium atom?

The oxidation state of Cr in CrO₄²⁻ is +6. When it is reduced to Cr³⁺, the oxidation state becomes +3. Therefore, the oxidation number decreases by 3 units.

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The CrO₄^2- Ion Was Involved in a Chemical Reaction, During

Question 14

Multiple Choice

The CrO₄^2- ion was involved in a chemical reaction, during which it is transformed into Cr³⁺ ions. What is the change in oxidation number of the chromium atom?

A) The oxidation number increases by 5 units.
B) The oxidation number decreases by 5 units.
C) The oxidation number increases by 1 unit.
D) The oxidation number decreases by 3 units.
E) The oxidation number decrease by 4 units.

Correct Answer: