Chapter 13.6, Problem 13.8BFP

Interpretation Introduction

Interpretation:

The lowest molality of ethylene glycol is to be calculated. Also, its mass to make the solution of that molality is to be calculated.

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.

The formula to calculate the molality of the solution is as follows:

$\text{Molality}=\frac{\text{amount}\left(\text{mol}\right)\text{of}\text{solute}}{\text{mass}\left(\text{kg}\right)\text{of}\text{}\text{solvent}}$ (1)

The conversion factor to convert $°\text{F}$ to $°\text{C}$ is as follows:

$T\left(°\text{C}\right)=\left(T\left(°\text{F}\right)-32°\text{F}\right)\left(\frac{5°\text{C}}{9°\text{F}}\right)$