Chapter 8.5, Problem 8.3P

Interpretation Introduction

Interpretation:

pKa of HCN if Ka value is $\text{4}\text{.9 }\times {\text{ 10}}^{\text{-10}}$ should be identified.

Concept Introduction:

pKa is the negative of logarithm of dissociation constant of acid used to determine the acidity of an acid.

Higher the value of pKa, lower will the acidic character and it can be shown as:

$\text{pKa = - log }\left(\text{Ka}\right)$.