Chapter 13, Problem 17QP

Interpretation Introduction

Interpretation:

The molality of each of given solution is to be calculated.

Concept introduction:

Molality is defined as the total number of moles present in one kilogram of solvent.

Mathematically, it can be expressed as follows;

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

$n=\frac{m}{M}$, here $n$ = no. of moles, $m$ =given mass, and $M$ =molar mass.

The relationship between gram($g$) and kilogram($kg$) can be expressed as:

$\text{1 g}={10}^{-3}\text{ kg}$, the conversion factor will be $\left(\frac{{10}^{-3}\text{ kg}}{\text{1 g}}\right)$