Balancing Redox Reactions Video Lessons

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Problem: Balance the following redox reactions occurring in basic solution.NO2−(aq) + Al(s) → NH 3(g) + AlO2−(aq)a. NO2−(aq) + H2O(l) + 2Al(s) + OH−(aq) → NH3(g) + 2AlO2−(aq)b. NO2−(aq) + H2O(l) + 2Al(s) + OH−(aq) → 2NH3(g) + 2AlO2−(aq)c. NO2−(aq) + H2O(l) + Al(s) + 2OH−(aq) → 2NH3(g) + AlO2−(aq)d. NO2−(aq) + 2H2O(l) + Al(s) + 2OH−(aq) → NH3(g) + AlO2−(aq)

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FREE Expert Solution

We are being asked to balance the given redox reaction occurring in a basic solution

When balancing redox reactions under basic conditions, we will follow the following steps.

Step 1. Separate the whole reaction into 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+)
Step 5. Balance the charges: add electrons to the more positive side (or less negative side)
Step 6. Balance electrons on the two half-reactions
Step 7. Get the overall reaction by adding the two reaction
Step 8. Balance remaining H+ by adding an equal amount of OH- ions to both sides
Step 9. H+(aq) will combine with OH-(aq) to form H2O(l)­
Step 10. Cancel out common species.


Balance the redox reaction under basic condition:

NO2(aq) + Al(s) → NH3(g) + AlO2(aq)

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Problem Details

Balance the following redox reactions occurring in basic solution.

NO2(aq) + Al(s) → NH 3(g) + AlO2(aq)

a. NO2(aq) + H2O(l) + 2Al(s) + OH(aq) → NH3(g) + 2AlO2−(aq)

b. NO2(aq) + H2O(l) + 2Al(s) + OH(aq) → 2NH3(g) + 2AlO2(aq)

c. NO2(aq) + H2O(l) + Al(s) + 2OH(aq) → 2NH3(g) + AlO2(aq)

d. NO2(aq) + 2H2O(l) + Al(s) + 2OH(aq) → NH3(g) + AlO2(aq)

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Our tutors have indicated that to solve this problem you will need to apply the Balancing Redox Reactions concept. You can view video lessons to learn Balancing Redox Reactions. Or if you need more Balancing Redox Reactions practice, you can also practice Balancing Redox Reactions practice problems.

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Based on our data, we think this problem is relevant for Professor Riehl's class at Minnesota State University - Mankato.