Chapter 17, Problem 17.3KSP

Interpretation Introduction

Interpretation:

The number of moles of sodium benzoate used to prepare buffer solution of $\text{pH}\text{=}5.05$ has to be calculated.

Concept introduction:

• $\text{pH}\text{=}{\text{pK}}_{\text{a}}\text{+}\text{log}\frac{\text{[conjugate base]}}{\text{[acid]}}$ is Henderson-Hasselbalch equation.
• Buffer solution is defined as a solution that oppose changes in $\text{pH}$ while adding little amount of either an acid or a base.
• Buffer solution is a combination of a weak acid and its conjugate base or a weak base and its conjugate acid.

To calculate: The number of moles of sodium benzoate used to prepare buffer solution of $\text{pH}\text{=}5.05$