Chapter 9.2, Problem 9.20QAP

Interpretation Introduction

Interpretation: The equivalent concentration of ${\text{Cl}}^{-}$ ions in the solution should be calculated.

Concept Introduction: The equivalent concentration is also known as normality of a solution and defined as the molar concentration of solution per equivalence factor.

The unit is eq/L. It can also be reported in meq/L where, $1\text{ eq}=1000\text{ meq}$ .

The equivalent concentration of a solution can be calculated as follows:

  $\text{Equivalent concentration}=\frac{\text{Equivalent weight}}{\text{Volume in L}}$

Here, $\text{Equivalent weight}$ of ion can be calculated as follows:

  $\text{Equivalent weight}=\frac{\text{Molecular weight}}{\text{Charge on ion}}$

For balancing the charge, the total positive charge should be equal to the total negative charge. Hence, the total concentration of anions and cations in the solution must be equal.