Chapter 6.8, Problem 6.11P

Interpretation Introduction

Interpretation:

The aqueous solution having lower freezing point should be determined.

Concept introduction:

The concepts which are used here are as follows:

• Colligative Properties: The properties of ideal solution which depends only on the number of particles of the solute dissolved in a definite amount of solvent and do not depends on the nature of the solute.
• Freezing point: Freezing point of a substance is the temperature at which the solid and the liquid forms of the substance are in equilibrium.
• Depression in freezing point: It is observed that the freezing point of the solution is always lower than that of pure solvent. The decrease is called the depression in freezing point.
• Van’t Hoff factor: It is defined as the ratio of the experimental value of colligative property to the calculated value of the colligative property. Since, depression in freezing point is a colligative property so the relation between van’t hoff factor and depression in freezing point is $\Delta T_{\text{F}}=\text{i}\times m$, where i is the van’t hoff factor and m is the molality.