Chapter 13, Problem 102E

Interpretation Introduction

Interpretation:

The freezing point of solution is to be calculated for the given concentration.

Concept introduction:

The temperature at which change of liquid state to solid state takes place is termed as the freezing point.

The freezing point depression is as follows:

$\Delta T_{\text{f}}=m\times K_{\text{f}}$ Here, $\Delta T_{\text{f}}$ is the change in temperature of the freezing point in ${}^{0}C$, $m$ is the molality of the solution in $\frac{\text{mol}\text{sloution}}{\text{kg}\text{solvent}}$ and $K_{\text{f}}$ is the freezing point depression constant for the solvent.

For water,

$K_{\text{f}}=1.86\frac{\text{C}\text{.kg solvent}}{\text{mol solute}}$