Chapter 17, Problem 90E

Interpretation Introduction

Interpretation: The apparent value of the van’tHoff factor for the given ${\text{CaCl}}_{\text{2}}$ solutions needs to be determined.

Concept Introduction: Colligative properties are the properties of solution which depend on the number of particles present in the solution. Some common examples of colligative properties are depression in freezing point, elevation in boiling point, osmotic pressure, lowering in vapor pressure, etc. The number of particles is shown with the help of Van’t Hoff factor ‘i’.

The mathematical expression for depression in freezing point is as given below:

  $\begin{array}{l}{\text{ΔT}}_{\text{f}}{\text{ = i × k}}_{\text{f}}\text{×m}\\ {\text{ΔT}}_{\text{f}}\text{ = Depression in freezing point}\\ \text{i = van't Hoff factor}\\ {\text{k}}_{\text{f}}=\text{Molal depression constant}\\ \text{m = Molality}\end{array}$