Chapter 10, Problem 80QAP

Interpretation Introduction

(a)

Interpretation:

Whether a pure substance is an electrolyte or a nonelectrolyte should be determined experimentally.

Concept introduction:

A substance that has a fixed chemical composition through a cell is called pure substance.

Interpretation Introduction

(b)

Interpretation:

The cause for a cold glass of beer to go“flat” upon warming is to be determined.

Concept introduction:

Two gases (nitrogen and carbon dioxide) are basically used to make beer. As the temperature increases solubility of the gas also decreases.

Interpretation Introduction

(c)

Interpretation:

The cause for the molality of a soluteto be ordinarily larger than its mole fraction is to be determined.

Concept introduction:

Molality is a concentration unit based on number of moles of solute divided by kilogram of solvent.

$\text{Molality}\text{=}\frac{\text{Moles}\text{of}\text{solute}}{\text{Kg}\text{of}\text{solvent}}$

Interpretation Introduction

(d)

Interpretation:

The cause for the boiling point to raise in the presence of a solute is to be determined.

Concept introduction:

Temperature at which the vapor strain of liquid equal to environmental pressure surrounded by liquid is known as boiling point.