Chapter 13, Problem 89IL

Interpretation Introduction

Interpretation: The molar mass of acetic acid in benzene and in water is to be determined. The state of acetic acid in both solutions is to be explained and the structure of acetic acid in benzene is to be drawn.

Concept introduction:

Colligative properties: Properties of solutions which having influence on the concentration of the solute in it. Colligative properties are,

• Decrease in the vapor pressure
• Increase in the boiling point
• Decline in the freezing point
• Osmotic pressure

Change in freezing point is calculated by using the equation,

  $\Delta T_{fp}=K_{fp}{m}_{solute}$

  where,

  $K_{fp}$ is the molal freezing point depression constant.

The number of moles of any substance can be determined using the equation

  $\text{Number}\text{of}\text{mole}\text{=}\frac{\text{Given}\text{mass}\text{of}\text{the}\text{substance}}{\text{Molar}\text{mass}}$