Chapter 7, Problem 141AE

Interpretation Introduction

Interpretation: The initial concentration of the formic acid needs to be calculated if the pH of the formic acid solution is 2.70.

Concept Introduction: From the given pH value, hydrogen ion concentration can be calculated as follows:

  $\left[{\text{H}}^{+}\right]={10}^{-pH}$

From hydrogen ion concentration, hydroxide ion concentration can be calculated as follows:

  $\left[{\text{OH}}^{-}\right]=\frac{K_w}{\left[{\text{H}}^{+}\right]}$