Chapter 16, Problem 128SCQ

(a)

Interpretation Introduction

Interpretation: To calculate the values of the degree of dissociation for formic acid and plot degree of dissociation against concentration. Also plot logarithm of concentration versus degree of dissociation.

Concept introduction: Degree of dissociation for formic acid is calculated from the relation of the degree of dissociation and concentration given below:

$\text{K=}\frac{\left({\text{C}}_{\text{ο}}\right)\left({\text{α}}^{\text{2}}\right)}{\left(\text{1-α}\right)}$

A graph of degree of dissociation versus concentration of acid is plotted.

The logarithm of concentration versus degree of dissociation graph is plotted.

(b)

Interpretation Introduction

Interpretation:

Relationship of the degree of dissociation and initial concentration of an acid or a base has to be determined.

Concept introduction: Degree of dissociation for formic acid is calculated from the relation of the degree of dissociation and concentration given below:

$\text{K=}\frac{\left({\text{C}}_{\text{ο}}\right)\left({\text{α}}^{\text{2}}\right)}{\left(\text{1-α}\right)}$

A graph of degree of dissociation versus concentration of acid is plotted.

The logarithm of concentration versus degree of dissociation graph is plotted.