Chapter 14, Problem 24QAP

Interpretation Introduction

(a)

Interpretation:

The acid-base pair to form a buffer solution of pH 4.0 needs to be determined.

Concept introduction:

A buffer is a solution which resists change in pH on addition of small amount of acid or base. A buffer is prepared by mixing a weak acid with its conjugate base ion or a weak base and its conjugate acid ion.

For example, the mixture of acetic acid and its conjugate base acetate ion will form a buffer solution.

The pH of a buffer solution is determined with the following equation

$\text{pH = pKa+log}\frac{\text{[salt]}}{\text{[acid]}}$

Also known as Henderson-Hasselbalch equation.

Interpretation Introduction

(b)

Interpretation:

The acid-base pair to form a buffer solution of pH 9.2 needs to be determined.

Concept introduction:

A buffer is a solution which resists change in pH on addition of small amount of acid or base. A buffer is prepared by mixing a weak acid with its conjugate base ion or a weak base and its conjugate acid ion.

For example, the mixture of acetic acid and its conjugate base acetate ion will form a buffer solution.

The pH of a buffer solution is determined with the following equation

$\text{pH = pKa+log}\frac{\text{[salt]}}{\text{[acid]}}$

Also known as Henderson-Hasselbalch equation.

Interpretation Introduction

(c)

Interpretation:

The acid-base pair to form a buffer solution of pH 11 needs to be determined.

Concept introduction:

A buffer is a solution which resists change in pH on addition of small amount of acid or base. A buffer is prepared by mixing a weak acid with its conjugate base ion or a weak base and its conjugate acid ion.

For example, the mixture of acetic acid and its conjugate base acetate ion will form a buffer solution.

The pH of a buffer solution is determined with the following equation

$\text{pH = pKa+log}\frac{\text{[salt]}}{\text{[acid]}}$

Also known as Henderson-Hasselbalch equation.