Chapter 16, Problem 20PE

Interpretation Introduction

Interpretation:

The normality of the hydrochloric acid when $19.30\text{ mL}$ of it is titrated with $2.00\text{ g}$ of ${\text{Na}}_{\text{2}}{\text{CO}}_{\text{3}}$ in water is to be stated.

Concept introduction:

Normality is defined as the number of equivalents of solute per unit volume of the solution. Equivalent mass is the mass of the compound per equivalent. One equivalent of any substance means it would react with or supply 1 mole of electron or protons in a reaction.

The normality of a solution is a measure of concentration. It is equal to the ratio of gram equivalent weight to the volume of solution in liter. General expression is shown below.

$\text{Normality}=\frac{\text{Gram}\text{equivalent}\text{of}\text{solute}}{\text{Volume}\text{of}\text{solution}\text{in}\text{liter}}$