Chapter 18.5, Problem 18.8BFP

Interpretation Introduction

Interpretation: Given the value of percent dissociation, the value of ${\text{K}}_{\text{a}}$ for the given concentration of the acid must be found out.

Concept Introduction: Weak acid ( $\text{HA}$ ) will dissociate very little. ${\text{K}}_{\text{a}}$ gives the ratio of the concentrations of the products to the reactants.

Percent dissociation gives the ratio of the acid dissociated to the initial concentration of the acid.

  $\text{Percentdissociation}=\frac{{[\text{Acid]}}_{dissoc}}{{[\text{Acid}]}_{initial}}\times 100$