Balancing Redox Reaction Video Lessons

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Problem: Balance the following redox reaction by inserting the appropriate coefficients.H+ + CrO42- + NO2- → Cr3+ + H2O +NO3-

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We’re being asked to balance the given oxidation-reduction reaction:

H+ + CrO42– + NO2 Cr3+ + H2O + NO3


We assume that the redox is in acidic solution since H+ is present. When balancing redox reactions under acidic conditions, we will follow the following steps.

Step 1: Separate the whole reaction into two half-reactions.

Step 2: Balance the non-hydrogen and non-oxygen elements first.

Step 3: Balance oxygen by adding H2O to the side that needs oxygen. (1 O: 1 H2O)

Step 4: Balance hydrogen by adding H+ to the side that needs hydrogen. (1 H: 1 H+)


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Problem Details

Balance the following redox reaction by inserting the appropriate coefficients.

H+ + CrO42- + NO2- → Cr3+ + H2O +NO3-

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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 Balancing Redox Reaction concept. You can view video lessons to learn Balancing Redox Reaction. Or if you need more Balancing Redox Reaction practice, you can also practice Balancing Redox Reaction practice problems.

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Our expert Chemistry tutor, Sabrina took 7 minutes and 3 seconds to solve this problem. You can follow their steps in the video explanation above.

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Based on our data, we think this problem is relevant for Professor Yang's class at OU.