Chapter 8, Problem 175CP

A buffer is made using $\text{45}\text{.0 mL}$ of $\text{0}{\text{.750 M HC}}_{\text{3}}{\text{H}}_{\text{5}}{\text{O}}_{\text{2}}\left({\text{K}}_{\text{a}}\text{ = 1}{\text{.3 × 10}}^{\text{-5}}\right)$ and $\text{55}\text{.0 mL}$ of $\text{0}{\text{.700 M NaC}}_{\text{3}}{\text{H}}_{\text{5}}{\text{O}}_{\text{2}}$ .What volume of $\text{0}\text{.10 M NaOH}$ must be added to change the $\text{pH}$ of the original buffer solution by $\text{2}\text{.5\%}$ ?