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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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!](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbeabe323-b0dc-48cc-b923-74ff514f77ea%2Fc47259bb-fd31-476b-b390-abad1fa78bb2%2Fbshqsu_processed.jpeg&w=3840&q=75)
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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