   # Calculate the pH of each of the following buffered solutions. a. 0.10 M acetic acid/0.25 M sodium acetate b. 0.25 M acetic acid/0.10 M sodium acetate c. 0.080 M acetic acid/0.20 M sodium acetate d. 0.20 M acetic acid/0.080 M sodium acetate ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 14, Problem 35E
Textbook Problem
1 views

## Calculate the pH of each of the following buffered solutions.a. 0.10 M acetic acid/0.25 M sodium acetateb. 0.25 M acetic acid/0.10 M sodium acetatec. 0.080 M acetic acid/0.20 M sodium acetated. 0.20 M acetic acid/0.080 M sodium acetate

(a)

Interpretation Introduction

Interpretation:

The pH value of a solution of each compound in the given list is to be calculated.

Concept introduction:

The pH value is the measure of H+ ions. The relation between pH and pKa is given by Henderson-Hassel Bach equation. According to this equation,

pH=pKa+log[Base][Acid]

To determine: The pH value of a solution of 0.10M acetic acid and 0.25M sodium acetate.

### Explanation of Solution

Explanation

The concentration of acetic acid is 0.10M .

The concentration of sodium acetate is 0.25M .

The value of Ka for acetic acid is 1.8×105 .

The pH is calculated using the Henderson-Hassel Bach equation,

pH=pKa+log[Base][Acid] (1)

Where,

• pH is the measure of H+ ions.
• pKa is the measure of acidic strength.
• [Base] is concentration of conjugate base.
• [Acid] is concentration of weak acid.

The formula of pKa is,

pKa=logKa

Where,

• Ka is acid equilibrium constant

(b)

Interpretation Introduction

Interpretation:

The pH value of a solution of each compound in the given list is to be calculated.

Concept introduction:

The pH value is the measure of H+ ions. The relation between pH and pKa is given by Henderson-Hassel Bach equation. According to this equation,

pH=pKa+log[Base][Acid]

(c)

Interpretation Introduction

Interpretation:

The pH value of a solution of each compound in the given list is to be calculated.

Concept introduction:

The pH value is the measure of H+ ions. The relation between pH and pKa is given by Henderson-Hassel Bach equation. According to this equation,

pH=pKa+log[Base][Acid]

To determine: The pH value of a solution of 0.080M acetic acid and 0.20M sodium acetate.

(d)

Interpretation Introduction

Interpretation:

The pH value of a solution of each compound in the given list is to be calculated.

Concept introduction:

The pH value is the measure of H+ ions. The relation between pH and pKa is given by Henderson-Hassel Bach equation. According to this equation,

pH=pKa+log[Base][Acid]

To determine: The pH value of a solution of 0.20M acetic acid and 0.080M sodium acetate.

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