Chapter 3, Problem 3.17P

Interpretation Introduction

(a)

Interpretation:

The $\text{p}{K}_{\text{b}}$ of acetate, ${\text{CH}}_{\text{3}}{\text{CO}}_{\text{2}}{}^{-}$ is to be predicted.

Concept introduction:

Dissociation constant $K_{\text{a}}$ is used to measure the strength of a Brønsted acid. There is an inverse relationship between the acidity of a Brønsted acid and its $\text{p}{K}_{\text{a}}$ value. Higher the value of $\text{p}{K}_{\text{a}}$, weaker is the acid.

Interpretation Introduction

(b)

Interpretation:

The reason as to why an aqueous solution of acetic acid has an acidic $\text{pH}$, whereas an aqueous solution of sodium acetate has a basic $\text{pH}$ is to be stated.

Concept introduction:

Dissociation constant $K_{\text{a}}$ is used to measure the strength of a Brønsted acid. There is an inverse relationship between the acidity of a Brønsted acid and its $\text{p}{K}_{\text{a}}$ value. Higher the value of $\text{p}{K}_{\text{a}}$, weaker is the acid.