Chapter 14, Problem 82AE

(a)

Interpretation Introduction

Interpretation:

Molality of aqueous sugar solution has to be determined.

Concept Introduction:

Molality is amount of solute present in $1\text{ kg}$ of solvent. Expression for molality of solution is as follows:

  $\text{Molality of solution}=\frac{\text{Moles of solute}}{\text{Mass }\left(\text{kg}\right)\text{of solvent}}$

(b)

Interpretation Introduction

Interpretation:

Boiling point of aqueous sugar solution has to be determined.

Concept Introduction:

Colligative properties are dependent on amount of solute and not on their natures. These are caused due to addition of nonvolatile solute in any solution. Below mentioned are colligative properties.

1. Freezing point depression

2. Boiling point elevation

3. Vapor pressure lowering

4. Osmotic pressure