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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![**Redox Reactions: Understanding Half-Reactions**
In this exercise, we are asked to write the half-reactions for the following redox reaction:
**Overall Reaction:**
\[ 2\text{Li} + \text{H}_2 \rightarrow 2\text{LiH} \]
**Half-Reactions Breakdown:**
1. **Oxidation Half-Reaction:**
In an oxidation reaction, electrons are lost. Here, lithium (Li) undergoes oxidation:
\[ \text{Li} \rightarrow \text{Li}^+ + e^- \]
Since there are two lithium atoms involved, the balanced oxidation half-reaction is:
\[ 2\text{Li} \rightarrow 2\text{Li}^+ + 2e^- \]
2. **Reduction Half-Reaction:**
In a reduction reaction, electrons are gained. Here, hydrogen (H\(_2\)) undergoes reduction:
\[ \text{H}_2 + 2e^- \rightarrow 2\text{H}^- \]
These half-reactions illustrate how lithium is oxidized and hydrogen is reduced in this redox process.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F30f8b710-1a61-4c05-9269-dd497cde8c1e%2Fbc7eba70-9d26-4da8-a784-c7150c769040%2F4d63t1_processed.png&w=3840&q=75)
Transcribed Image Text:**Redox Reactions: Understanding Half-Reactions**
In this exercise, we are asked to write the half-reactions for the following redox reaction:
**Overall Reaction:**
\[ 2\text{Li} + \text{H}_2 \rightarrow 2\text{LiH} \]
**Half-Reactions Breakdown:**
1. **Oxidation Half-Reaction:**
In an oxidation reaction, electrons are lost. Here, lithium (Li) undergoes oxidation:
\[ \text{Li} \rightarrow \text{Li}^+ + e^- \]
Since there are two lithium atoms involved, the balanced oxidation half-reaction is:
\[ 2\text{Li} \rightarrow 2\text{Li}^+ + 2e^- \]
2. **Reduction Half-Reaction:**
In a reduction reaction, electrons are gained. Here, hydrogen (H\(_2\)) undergoes reduction:
\[ \text{H}_2 + 2e^- \rightarrow 2\text{H}^- \]
These half-reactions illustrate how lithium is oxidized and hydrogen is reduced in this redox process.
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