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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![**Title: Calculating the pH of an Aqueous Solution of Benzoic Acid**
**Instruction:**
Use the references to access important values if needed for this question.
**Problem Statement:**
Calculate the pH of a 0.528 M aqueous solution of benzoic acid (C₆H₅COOH). The acid dissociation constant (Kₐ) for benzoic acid is given as 6.3 x 10⁻⁵.
**Formula to Calculate pH:**
The formula to determine the pH of an acidic solution is:
\[ \text{pH} = -\log[\text{H}^+] \]
Where \([\text{H}^+]\) is the concentration of hydrogen ions in the solution.
**Task:**
Determine the concentration of hydrogen ions \([\text{H}^+]\) using the provided concentration of the acid and the acid dissociation constant, and then calculate the pH using the above formula.
**Additional Notes:**
- Use the quadratic formula if needed to solve for hydrogen ion concentration.
- For weak acids like benzoic acid, assume that \([\text{H}^+]\) is much smaller than the initial concentration of the acid.
**Answer Box:**
pH = [Enter your answer here]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00585539-79e1-42a7-8a75-95bc6de8d9d5%2F676542a7-8828-45f1-9b00-06840c9d9436%2Fm9mfi9w_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Title: Calculating the pH of an Aqueous Solution of Benzoic Acid**
**Instruction:**
Use the references to access important values if needed for this question.
**Problem Statement:**
Calculate the pH of a 0.528 M aqueous solution of benzoic acid (C₆H₅COOH). The acid dissociation constant (Kₐ) for benzoic acid is given as 6.3 x 10⁻⁵.
**Formula to Calculate pH:**
The formula to determine the pH of an acidic solution is:
\[ \text{pH} = -\log[\text{H}^+] \]
Where \([\text{H}^+]\) is the concentration of hydrogen ions in the solution.
**Task:**
Determine the concentration of hydrogen ions \([\text{H}^+]\) using the provided concentration of the acid and the acid dissociation constant, and then calculate the pH using the above formula.
**Additional Notes:**
- Use the quadratic formula if needed to solve for hydrogen ion concentration.
- For weak acids like benzoic acid, assume that \([\text{H}^+]\) is much smaller than the initial concentration of the acid.
**Answer Box:**
pH = [Enter your answer here]
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