Chapter 2.3, Problem 4RQ

(a)

Interpretation Introduction

Interpretation: Carbonated soft drink needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

Carbonated soft drink is a mixture.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

Carbonated soft drink is usually solutions of various substances dissolved in the water. In Carbonated soft drink, the components can be separated by many different physical methods (filtration, evaporation). Since, the amount of each of these can vary (flavoring, sugar, carbonation, color), it’s a mixture.

(b)

Interpretation Introduction

Interpretation: Table salt (sodium chloride) needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

Table salt (sodium chloride) is a mixture.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

Sodium chloride contains sodium and chlorine that can be physically separated into its components. So, Sodium chloride is a mixture.

(c)

Interpretation Introduction

Interpretation: Vanilla pudding needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

Vanilla pudding is a mixture.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

Vanilla pudding is a combination of similar or dissimilar components such as sugar, cornstarch, and also artificial flavorings & coloring. So, vanilla pudding is a mixture.

(d)

Interpretation Introduction

Interpretation: A penny needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

Penny is a mixture.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

A penny contains zinc and copper that can be physically separated into its components. So, penny is a mixture.

(e)

Interpretation Introduction

Interpretation: Ink from a pen needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

Ink from a pen is a mixture.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

Ink from a pen contains water and dyes that can be physically separated into its components. So, ink from a pen is a mixture with water, solvent, in its pure state.

(f)

Interpretation Introduction

Interpretation: 24-karat gold needs to be identified as mixture or pure substance.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 4RQ

24-karat goldis a pure substance.

Explanation of Solution

Substance is made up of the similar types of the atoms. A sample of matter with both definite & constant composition and also distinct chemical properties called a pure substance. A mixture is the combination of similar or dissimilar components. The property of mixture depends on the components present in a mixture.

24-karat gold does not contain traces of any other metals. So, 24-karat gold is a pure substance.