Chapter 13, Problem 18QP

Interpretation Introduction

Interpretation: The molality of each of the given aqueous solutions is to be calculated.

Concept introduction:

Molality is the number of moles of the solute dissolved in per $\text{kg}$ of solvent.

The expression to molality is as follows:

$m=\frac{\text{moles of solute}}{\text{mass of solvent}\left(\text{in kg}\right)}$

The relation between moles $\left(n\right)$, mass and molar mass is given by the following formula:

$n=\frac{\text{mass}}{\text{molar mass}}$