Chapter 3, Problem 15PE

(a)

Interpretation Introduction

Interpretation:

Hot tea has to be classified as a pure substance or a mixture.

Concept Introduction:

Matter can be classified into two type’s namely pure substance and mixture.

Pure substance:  A single component that has a constant composition, irrespective of the sample size and the sample origin is called as pure substance.  A pure substance could not be broken down to other pure substances by any physical change.

Example:  Water, sugar etc.

Mixture:  A mixture consists of more than one substance and the composition of a mixture is dependent on the sample.  The separation of mixture into its components can be done by physical changes.

(b)

Interpretation Introduction

Interpretation:

Beach sand has to be classified as a pure substance or a mixture.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Carbon dioxide has to be classified as a pure substance or a mixture.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Cement has to be classified as a pure substance or a mixture.

Concept Introduction:

Refer to part (a).

(e)

Interpretation Introduction

Interpretation:

Zinc has to be classified as a pure substance or a mixture.

Concept Introduction:

Refer to part (a).

(f)

Interpretation Introduction

Interpretation:

Vinegar has to be classified as a pure substance or a mixture.

Concept Introduction:

Refer to part (a).