Chapter 2.2, Problem 15LC

(a)

Interpretation Introduction

Interpretation: Food coloring needs to be classified as a homogeneous or heterogeneous mixture.

Concept Introduction: A mixture is said to be homogenous when its composition is uniform throughout whereas a mixture is said to be heterogenous when its composition is not uniform throughout.

Answer to Problem 15LC

Homogeneous mixture.

Explanation of Solution

The composition in the entire mixture of food coloring is uniform throughout so it is said to be a homogenous mixture.

(b)

Interpretation Introduction

Interpretation: Ice cubes in liquid water need to be classified as a homogeneous or heterogeneous mixture.

Concept Introduction: A mixture is said to be homogenous when its composition is uniform throughout whereas a mixture is said to be heterogenous when its composition is not uniform throughout.

Answer to Problem 15LC

Heterogeneous mixture.

Explanation of Solution

The composition in the entire mixture of ice cubes in liquid water is not uniform throughout so it is said to be a heterogeneous mixture.

(c)

Interpretation Introduction

Interpretation: Mouthwash needs to be classified as a homogeneous or heterogeneous mixture.

Concept Introduction: A mixture is said to be homogenous when its composition is uniform throughout whereas a mixture is said to be heterogenous when its composition is not uniform throughout.

Answer to Problem 15LC

Homogeneous mixture.

Explanation of Solution

The composition in the entire mixture of mouthwash is uniform throughout so it is said to be a homogenous mixture.

(d)

Interpretation Introduction

Interpretation: Mashed, unpeeled potatoes need to be classified as a homogeneous or heterogeneous mixture.

Concept Introduction: A mixture is said to be homogenous when its composition is uniform throughout whereas a mixture is said to be heterogenous when its composition is not uniform throughout.

Answer to Problem 15LC

Heterogeneous mixture.

Explanation of Solution

The composition in the entire mixture of the mashed, unpeeled potatoes is not uniform throughout so it is said to be a heterogeneous mixture.