Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![**Exercise: Equilibrium Constant Calculation**
**Objective:** Determine the \( K_{eq} \) for the reaction shown below. Use the space provided for your calculations. Write the \( K_{eq} \) in the box provided. Does this reaction favor **reactants** or **products**? (circle your choice).
**Chemical Reaction:**
- **Reactants:**
1. Phenol (OH group on benzene ring)
- \( pK_a = 10 \)
2. Ethylamine (Et-NH\(_2\))
- \( pK_b = 3 \)
- **Products:**
1. Phenoxide ion (O\(^-\) on benzene ring)
2. Ethylammonium ion (Et-NH\(_3^+\))
**Instructions:**
Calculate the equilibrium constant (\( K_{eq} \)) for the given reaction using the provided \( pK_a \) and \( pK_b \) values. Determine whether the reaction favors the formation of reactants or products, and circle your choice.
---
**Note:**
1. Equilibrium constant (\( K_{eq} \)) can be determined using the relationship:
\[
K_{eq} = 10^{(pK_b - pK_a)}
\]
2. After calculating, consider the magnitude of \( K_{eq} \) to determine the favored side of the equilibrium:
- \( K_{eq} > 1 \): Products are favored.
- \( K_{eq} < 1 \): Reactants are favored.](https://content.bartleby.com/qna-images/question/c3275796-b029-439c-8f74-d618d19371ab/2e3fdc83-ba80-41e3-8758-b3edfe9700f5/poi57v_processed.jpeg)
Transcribed Image Text:**Exercise: Equilibrium Constant Calculation**
**Objective:** Determine the \( K_{eq} \) for the reaction shown below. Use the space provided for your calculations. Write the \( K_{eq} \) in the box provided. Does this reaction favor **reactants** or **products**? (circle your choice).
**Chemical Reaction:**
- **Reactants:**
1. Phenol (OH group on benzene ring)
- \( pK_a = 10 \)
2. Ethylamine (Et-NH\(_2\))
- \( pK_b = 3 \)
- **Products:**
1. Phenoxide ion (O\(^-\) on benzene ring)
2. Ethylammonium ion (Et-NH\(_3^+\))
**Instructions:**
Calculate the equilibrium constant (\( K_{eq} \)) for the given reaction using the provided \( pK_a \) and \( pK_b \) values. Determine whether the reaction favors the formation of reactants or products, and circle your choice.
---
**Note:**
1. Equilibrium constant (\( K_{eq} \)) can be determined using the relationship:
\[
K_{eq} = 10^{(pK_b - pK_a)}
\]
2. After calculating, consider the magnitude of \( K_{eq} \) to determine the favored side of the equilibrium:
- \( K_{eq} > 1 \): Products are favored.
- \( K_{eq} < 1 \): Reactants are favored.
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