Chapter 2, Problem 4P

Interpretation Introduction

(a) Interpretation:

pH of the 0.35 M hydrochloric acid solutions must be found out.

Concept introduction:

• Strong acids are ionized completely and so the concentration of ${\text{H}}^{\text{+}}$ is same that of acid.

• pH is the negative log of ${\text{H}}^{\text{+}}$.

Interpretation Introduction

(b) Interpretation:

pH of the 0.35 M acetic acid solutions must be found out.

Concept introduction:

• Strong acids are ionized completely and so the concentration of ${\text{H}}^{\text{+}}$is same that of acid.

• pH is the negative log of ${\text{H}}^{\text{+}}$.

Interpretation Introduction

(c) Interpretation:

pH of the 0.035 M acetic acid solutions must be found out.

Concept introduction:

• Strong acids are ionized completely and so the concentration of ${\text{H}}^{\text{+}}$is same that of acid.

• pH is the negative log of ${\text{H}}^{\text{+}}$.

Interpretation Introduction

(d) Interpretation:

The differences in pH values in the above three cases must be explained.

Concept introduction:

• Weak acids undergo partial dissociation in aqueous furnishing lesser amount of ${\text{H}}^{\text{+}}$.

• A weak acid has higher pH than expected.

• Strong acids undergo complete dissociation.