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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Transcribed Image Text:**Problem Statement:**
Calculate the pH of a 0.268 M sodium acetate solution.
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**Explanation:**
This task involves determining the pH of a sodium acetate solution using its concentration. Sodium acetate is a salt that can influence the pH of a solution when dissolved in water. Calculating the pH involves understanding the hydrolysis of acetate ions, which results in a basic solution.
**Approach:**
1. **Write the chemical equation** for the hydrolysis of acetate ions (CH₃COO⁻).
2. **Use the ionization constant (Kₐ)** of acetic acid to find the base dissociation constant (K_b) for acetate ions.
3. **Set up the equilibrium expression** to find the concentration of hydroxide ions (OH⁻).
4. **Calculate the pH** from the pOH obtained.
This is a standard problem in the study of acid-base chemistry, particularly in buffer solutions and salt hydrolysis.
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