Chapter 13, Problem 101E

Interpretation Introduction

Interpretation:

The freezing point of the water solution at each of the given concentration

is to be calculated concentration.

Concept Introduction:

The temperature at which change of liquid state to solid state takes is called freezing point.

The freezing point depression is as follows:

$\Delta T_{\text{f}}=m\times K_{\text{f}}$…… in the same line (1)

Here, $\Delta T_{\text{f}}$ is the change in temperature of the freezing point in $°\text{C}$, $m$ is the molality

of the solution in $\frac{\text{mol solute}}{\text{kg solvent}}$ and $K_{\text{f}}$ is the freezing point depression constant for the

solvent.

For water:

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