Chapter 13, Problem 13.51P

Interpretation Introduction

Interpretation:

The difference between molarity and molality is to be determined. Also, the circumstances under which molality will be more accurate than molarity is to be determined.

Concept introduction:

Molality is the measure of the concentration of solute in the solution. It is the amount of solute that is dissolved in one kilogram of the solvent. It is represented by $\text{m}$ and its unit is moles per kilograms. The solute is the substance that is present in a smaller amount and solvent is the substance that is present in a larger amount.

Molarity is defined as the number of moles of solute that are dissolved in one litre of solution. It is represented by $\text{M}$ and its unit is $\text{mol/L}$.