Chapter 19, Problem 19.34P

(a)

Interpretation Introduction

Interpretation:

To prepare a buffer with $\text{pH}\approx 4.5$, specific acid-base conjugate pairs has to be given.

Concept Introduction:

Buffer solution:

  An aqueous solution consisting mixture of weak base and its conjugate acid or weak acid and its conjugate base.  Its $\text{pH}$ value changes very small when a small amount of strong base or an acid added to it.

(b)

Interpretation Introduction

Interpretation:

To prepare a buffer with a $\text{pH}\approx 7.0$, specific acid-base conjugate pairs has to be given.

Concept Introduction:

Buffer solution:

  An aqueous solution consisting mixture of weak base and its conjugate acid or weak acid and its conjugate base.  Its $\text{pH}$ value changes very small when a small amount of strong base or an acid added to it.