FOUND.OF COLLEGE CHEMISTRY
FOUND.OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781119234555
Author: Hein
Publisher: WILEY
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Chapter 1.4, Problem 1.2P

(a)

Interpretation Introduction

Interpretation:

Vinegar has to be classified as a mixture or pure substance and the reason has to be explained.

Concept Introduction:

Mixture:

A mixture always contains two or more substances that can be present in varying amounts.  The components of a mixture do not lose their identities and may be separated by physical means.  There are two types of mixture,

  • Homogeneous mixture
  • Heterogeneous mixture

Homogeneous mixture:

Homogenous mixture consist of a single phase be it liquid, gas, or solid the chemical composition is the same for any sample of the mixture.

Heterogeneous mixture:

Heterogeneous mixture consist of different phase are not uniform they will not have an identical composition

Pure substance:

A pure substance (element or compound) always has a definite composition by mass.  The elements in the compounds lose their identities and may be separated only by chemical means.

(b)

Interpretation Introduction

Interpretation:

Sodium chloride solution has to be classified as a mixture or pure substance and the reason has to be explained.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

Gold has to be classified as a mixture or pure substance and the reason has to be explained.

Concept Introduction:

Refer to part (a).

(d)

Interpretation Introduction

Interpretation:

Milk has to be classified as a mixture or pure substance and the reason has to be explained.

Concept Introduction:

Refer to part (a).

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