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Problem: Which element is reduced in this reaction?Cr2O72− + 3HNO2 + 5H+ → 2Cr3+ + 3NO3− + 4H2OEnter the chemical symbol of the element.

FREE Expert Solution

To determine which element is reduced or oxidized, we must identify the changes in their oxidation states. Compare the oxidation number of the element on the reactant side and on the product side.

Remember the mnemonics:

Loss                Gain

Electrons         Electrons

Oxidation         Reduction

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Problem Details

Which element is reduced in this reaction?

Cr2O72− + 3HNO+ 5H→ 2Cr3+ + 3NO3− + 4H2O

Enter the chemical symbol of the element.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Redox Reactions concept. If you need more Redox Reactions practice, you can also practice Redox Reactions practice problems.