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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![### Acid Dissociation Constants (Kₐ) and Conjugate Bases
In this section, we will explore the acid dissociation constants (Kₐ values) of different acids and determine the formula for the strongest conjugate base. The Kₐ value is a measure of the strength of an acid in solution; lower values indicate weaker acids.
1. **Phenol (a weak acid)**, \( \text{C}_6\text{H}_5\text{OH} \):
- **Kₐ**: \(1.00 \times 10^{-10}\)
2. **Hydrofluoric Acid (HF)**:
- **Kₐ**: \(7.20 \times 10^{-4}\)
3. **Acetylsalicylic Acid (aspirin)**, \( \text{HC}_9\text{H}_7\text{O}_4 \):
- **Kₐ**: \(3.00 \times 10^{-4}\)
Given these values, the **strongest conjugate base** is associated with the **weakest acid**, which has the lowest Kₐ value.
#### Task
**What is the formula for the strongest conjugate base?**
\[ \boxed{\hspace{1cm}} \]
The provided information presents the Kₐ values for phenol, hydrofluoric acid, and acetylsalicylic acid. Based on this information, students are expected to determine that the strongest conjugate base comes from phenol, as it has the lowest Kₐ value, indicating it is the weakest acid of the three listed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F03ba95c9-584b-483d-8f8a-8f0f9c4c55b7%2F09655ea7-4d16-4021-ad5a-75ef864f6973%2Fu7u6zcf_processed.png&w=3840&q=75)
Transcribed Image Text:### Acid Dissociation Constants (Kₐ) and Conjugate Bases
In this section, we will explore the acid dissociation constants (Kₐ values) of different acids and determine the formula for the strongest conjugate base. The Kₐ value is a measure of the strength of an acid in solution; lower values indicate weaker acids.
1. **Phenol (a weak acid)**, \( \text{C}_6\text{H}_5\text{OH} \):
- **Kₐ**: \(1.00 \times 10^{-10}\)
2. **Hydrofluoric Acid (HF)**:
- **Kₐ**: \(7.20 \times 10^{-4}\)
3. **Acetylsalicylic Acid (aspirin)**, \( \text{HC}_9\text{H}_7\text{O}_4 \):
- **Kₐ**: \(3.00 \times 10^{-4}\)
Given these values, the **strongest conjugate base** is associated with the **weakest acid**, which has the lowest Kₐ value.
#### Task
**What is the formula for the strongest conjugate base?**
\[ \boxed{\hspace{1cm}} \]
The provided information presents the Kₐ values for phenol, hydrofluoric acid, and acetylsalicylic acid. Based on this information, students are expected to determine that the strongest conjugate base comes from phenol, as it has the lowest Kₐ value, indicating it is the weakest acid of the three listed.
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