To prepare a buffer with pH ≈ 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 pH value changes very small when a small amount of strong base or an acid added to it.

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Chapter 19, Problem 19.34P

(a)

Interpretation Introduction

Interpretation:

To prepare a buffer with pH ≈ 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 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 pH ≈ 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 pH value changes very small when a small amount of strong base or an acid added to it.

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