Chapter 17, Problem 17.104QP

Interpretation Introduction

Interpretation:

The volume of $\text{NaOH}$ required to prepare buffer solution of the given pH using $\text{NaOH}\text{and}{\text{NaH}}_{\text{2}}{\text{PO}}_{\text{4}}$ has to be calculated.

Concept introduction:

• Buffer solution is defined as a solution that oppose changes in $\text{pH}$ while adding little amount of either an acid or a base. In general, addition of acid or base does not affect the $\text{pH}$ in buffer solution but if it is more than amount of conjugate base or conjugate acid, then buffer loses its buffering capacity.
• Buffer solution is a combination of a weak acid and its conjugate base or vice-versa in an aqueous solution.

To calculate: The initial number of moles of ${\text{NaH}}_{\text{2}}{\text{PO}}_{\text{4}}$  and the volume of $\text{NaOH}$