Chapter 21.3, Problem 2PE

Interpretation Introduction

Interpretation: The value of $\text{pH}$ of a solution prepared by mixing $\text{10}\text{.0}\text{mL}$ of $\text{0}\text{.160}\text{M}\text{HCl}$ with $\text{15}\text{.0}\text{mL}$ of water is to be calculated. The volume of antacid containing $\text{4}{\text{.00×10}}^{\text{2}}\text{mg}$ of $\text{Mg}{\left(\text{OH}\right)}_{\text{2}}$ in $\text{5}\text{.00}\text{mL}$ of water required to neutralize this volume of acid is to be calculated.

Concept introduction: The concentration of a solution is defined as the number of moles of solute dissolved in a liter of solution. Concentration of a solution is expressed in moles per unit volume of a substance.

To determine: The value of $\text{pH}$ of a solution prepared by mixing $\text{10}\text{.0}\text{mL}$ of $\text{0}\text{.160}\text{M}\text{HCl}$ with $\text{15}\text{.0}\text{mL}$ of water. The volume of antacid containing $\text{4}{\text{.00×10}}^{\text{2}}\text{mg}$ of $\text{Mg}{\left(\text{OH}\right)}_{\text{2}}$ in $\text{5}\text{.00}\text{mL}$ of water required to neutralize this volume of acid.