Chapter 14, Problem 58E

Interpretation Introduction

(a)

Interpretation:

To identify the solution in which vapour pressure of water is highest.

Concept introduction:

Vapour pressure is a colligative property it means vapour pressure depends on moles of solute present in the solution. So, from observing the solutions carefully vapor pressure of solutions can be compared.

Interpretation Introduction

(b)

Interpretation:

To identify the solution, in which vapor pressure of water remains constant even if water evaporates from the solution.

Concept introduction:

Vapour pressure is a colligative property it means vapour pressure depends on moles of solute present in the solution. The escaping tendency depends on number of solutes present in the solution. In solution 1, NaCl solute is dissolved but in solution 2, no solute is dissolved.

Interpretation Introduction

(c)

Interpretation:

To identify the solution having high boiling point.

Concept introduction:

Boiling point is a colligative property. Colligative property is that property which depends on presence of number of solute in the solution. To identify the solution having higher boiling point, find which solution has lower vapor pressure.