Chapter 13, Problem 13.150P

Interpretation Introduction

Interpretation:

The general equation that shows the relationship between molarity and molality is to be determined. Also, the reason for both being approximately equal for very dilute aqueous solutions is to be determined.

Concept introduction:

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

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 $m$ and its unit is moles per kilograms.

The solute is the substance that is present in a smaller amount and it gets dissolved in some other substance. The solvent is the substance that is present in a larger amount and it dissolves the solute in itself.