Chapter 19, Problem 19.25P

Interpretation Introduction

Interpretation:

The component concentration ratio $\left[{\text{NO}}_{\text{2}}{}^{\text{-}}\right]\text{/}\left[{\text{HNO}}_{\text{2}}\right]$ of the given buffer has to be calculated.

Concept Introduction:

Buffer-component concentration ratio:

Buffer-component concentration ratio is given by,

$\text{Buffer-component concentration ratio}\text{=}\frac{\text{concentration}\text{of}\text{base}\text{in}\text{buffer}}{\text{concentration}\text{of}\text{acid}\text{in}\text{buffer}}$

When the buffer-component concentration ratio is equal to 1, the buffer resists changes in $\text{pH}$ with added acid to the same extent that it resists changes in $\text{pH}$ with added base.