Chapter 17.2, Problem 17.2.4SR

Interpretation Introduction

Interpretation:

From the given figures predict ascending order $\text{pH}$ has to be identified.

Concept introduction:

• $\text{pH}$ is the logarithm of the reciprocal of the concentration  of ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$ in a solution.
• $\text{pH}\text{=}{\text{pK}}_{\text{a}}\text{+}\text{log}\frac{\text{[conjugate base]}}{\text{[acid]}}$ is Henderson-Hasselbalch equation.
• If concentration of conjugate base is larger than weak acid then $\text{pH}>{\text{pK}}_{\text{a}}$
• If concentration of weak acid is larger than conjugate base then $\text{pH}<{\text{pK}}_{\text{a}}$
• 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.

To identify: Ascending order of $\text{pH}$ from the given figures