half-reactions in the reaction

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Balancing Half-Reactions in Battery Chemistry**

In this section, we will explore how to identify and balance the half-reactions that take place in a typical battery to produce electricity.

**Chemical Reaction:**
\[ \text{Zn}_{(s)} + 2\text{MnO}_2{(s)} \rightleftharpoons \text{Mn}_2\text{O}_3{(s)} + \text{ZnO}_{(s)} \]

### Steps to Balance the Half-Reactions:

1. **Identify the Reduction and Oxidation Half-Reactions:**
    - **Oxidation Half-Reaction**:
        \[ \text{Zn}_{(s)} \rightarrow \text{ZnO}{(s)} \]
    - **Reduction Half-Reaction**:
        \[ 2\text{MnO}_2{(s)} \rightarrow \text{Mn}_2\text{O}_3{(s)} \]

2. **Balance the Atoms:**
    - Ensure that the number of atoms of each element is the same on both sides of the equations.

3. **Balance the Electrons:**
    - Add electrons to one side of each half-reaction to account for the charges on either side of the equation.

### Explanation of Diagrams/Grapheds:

- **No Graphs or Diagrams Present:**
    This question does not include graphical data or diagrams.

### Demonstration of Work:
Use the Sketchpad tool to show the step-by-step process of balancing these half-reactions. 

**Note:** Below are the elements you will find in the Sketchpad toolbar:
- **Pencil** for drawing or writing.
- **Shapes** for geometric representations.
- **Connector** for linking points or objects.
- **Eraser** to remove any mistakes.

Ensure you thoroughly show each balancing step to reinforce learning concepts.

### Practice:

After completing the example, try balancing the following battery reaction on your own:

\[ \text{Zn}_{(s)} + \text{CuO}_{(s)} \rightarrow \text{ZnO}_{(s)} + \text{Cu}_{(s)} \]

This exercise will help solidify your understanding of balancing half-reactions in electrochemistry. Happy balancing!
Transcribed Image Text:**Balancing Half-Reactions in Battery Chemistry** In this section, we will explore how to identify and balance the half-reactions that take place in a typical battery to produce electricity. **Chemical Reaction:** \[ \text{Zn}_{(s)} + 2\text{MnO}_2{(s)} \rightleftharpoons \text{Mn}_2\text{O}_3{(s)} + \text{ZnO}_{(s)} \] ### Steps to Balance the Half-Reactions: 1. **Identify the Reduction and Oxidation Half-Reactions:** - **Oxidation Half-Reaction**: \[ \text{Zn}_{(s)} \rightarrow \text{ZnO}{(s)} \] - **Reduction Half-Reaction**: \[ 2\text{MnO}_2{(s)} \rightarrow \text{Mn}_2\text{O}_3{(s)} \] 2. **Balance the Atoms:** - Ensure that the number of atoms of each element is the same on both sides of the equations. 3. **Balance the Electrons:** - Add electrons to one side of each half-reaction to account for the charges on either side of the equation. ### Explanation of Diagrams/Grapheds: - **No Graphs or Diagrams Present:** This question does not include graphical data or diagrams. ### Demonstration of Work: Use the Sketchpad tool to show the step-by-step process of balancing these half-reactions. **Note:** Below are the elements you will find in the Sketchpad toolbar: - **Pencil** for drawing or writing. - **Shapes** for geometric representations. - **Connector** for linking points or objects. - **Eraser** to remove any mistakes. Ensure you thoroughly show each balancing step to reinforce learning concepts. ### Practice: After completing the example, try balancing the following battery reaction on your own: \[ \text{Zn}_{(s)} + \text{CuO}_{(s)} \rightarrow \text{ZnO}_{(s)} + \text{Cu}_{(s)} \] This exercise will help solidify your understanding of balancing half-reactions in electrochemistry. Happy balancing!
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