On your own paper, balance the following redox equations using the oxidation number change method. Be sure to label each step of the process and show all of your work. 1. NH3 + O₂ → NO₂ H₂O + 2 2. Al + MnO₂ → Al₂O3 + Mn

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**Balancing Redox Equations Using the Oxidation Number Change Method**

In this exercise, you will balance the following redox equations using the oxidation number change method. Please ensure to label each step of the process and demonstrate all of your work.

1. **Ammonia reacts with oxygen to form nitrogen dioxide and water:**
   
   \[
   \text{NH}_3 + \text{O}_2 \rightarrow \text{NO}_2 + \text{H}_2\text{O}
   \]

2. **Aluminum reacts with manganese dioxide to form aluminum oxide and manganese:**

   \[
   \text{Al} + \text{MnO}_2 \rightarrow \text{Al}_2\text{O}_3 + \text{Mn}
   \]

### Steps for Balancing Redox Equations Using the Oxidation Number Change Method:

1. **Identify and write the unbalanced redox equation.**
2. **Assign oxidation numbers to all atoms in the equation.**
3. **Determine which elements are oxidized and which are reduced.**
4. **Balance the atoms of the elements that are oxidized and reduced.**
5. **Balance the charge by adding electrons.**
6. **Add the same number of electrons to the opposite side to balance the electrons.**
7. **Balance the rest of the atoms (usually hydrogen and oxygen) using H\(_2\)O, H\(^+\), and OH\(^-\).**
8. **Make a final check to ensure that all elements and charges are balanced.**

Please proceed to balance the given equations by applying these steps.
Transcribed Image Text:**Balancing Redox Equations Using the Oxidation Number Change Method** In this exercise, you will balance the following redox equations using the oxidation number change method. Please ensure to label each step of the process and demonstrate all of your work. 1. **Ammonia reacts with oxygen to form nitrogen dioxide and water:** \[ \text{NH}_3 + \text{O}_2 \rightarrow \text{NO}_2 + \text{H}_2\text{O} \] 2. **Aluminum reacts with manganese dioxide to form aluminum oxide and manganese:** \[ \text{Al} + \text{MnO}_2 \rightarrow \text{Al}_2\text{O}_3 + \text{Mn} \] ### Steps for Balancing Redox Equations Using the Oxidation Number Change Method: 1. **Identify and write the unbalanced redox equation.** 2. **Assign oxidation numbers to all atoms in the equation.** 3. **Determine which elements are oxidized and which are reduced.** 4. **Balance the atoms of the elements that are oxidized and reduced.** 5. **Balance the charge by adding electrons.** 6. **Add the same number of electrons to the opposite side to balance the electrons.** 7. **Balance the rest of the atoms (usually hydrogen and oxygen) using H\(_2\)O, H\(^+\), and OH\(^-\).** 8. **Make a final check to ensure that all elements and charges are balanced.** Please proceed to balance the given equations by applying these steps.
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