Chapter 3, Problem 82A

Interpretation Introduction

(a)

Interpretation:

Whether brass is homogeneous or a heterogeneous mixture needs to be determined.

Concept introduction:

A pure substance is one that are made up of only one kind of atom or molecule.

Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Answer to Problem 82A

Brass is an element hence homogeneous.

Explanation of Solution

Homogeneous mixture is the mixture of two or more substances that are not separable as they are present in the same phase example: the mixture of two gases. Brass that is an alloy of zinc and copper has varying properties from that of zinc and copper.

(b)

Interpretation Introduction

Interpretation:

Whether salad is a homogeneous or a heterogeneous mixture needs to be determined.

Concept introduction:

A pure substance is one that are made up of only one kind of atom or molecule.

Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Answer to Problem 82A

Salad is heterogeneous.

Explanation of Solution

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Salad is a heterogeneous as the ingredients that are mixed to form a salad are solid and easily separable.

(c)

Interpretation Introduction

Interpretation:

Whether blood is a homogeneous or a heterogeneous mixture needs to be determined.

Concept introduction:

A pure substance is one that are made up of only one kind of atom or molecule.

Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Answer to Problem 82A

Blood is homogeneous.

Explanation of Solution

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Blood that constitutes different components that are not visible to eye. Though these different components can be seen under a microscope.

(d)

Interpretation Introduction

Interpretation:

Whether powered drink dissolved in water is a homogeneous or a heterogeneous mixture needs to be determined.

Concept introduction:

A pure substance is one that are made up of only one kind of atom or molecule.

Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.

Heterogeneous mixtures are separable and are generally in different phases as sand water, or a mixture of two solids that are separable.

Answer to Problem 82A

Powdered drink dissolved in water is a homogeneous mixture.

Explanation of Solution

Homogeneous mixture is the mixture of two or more substances that are not separable or they are present in the same phase, as the mixture of two gases.

Powdered drink dissolved in water is a homogeneous mixture as they cannot be seen or separated by a filter paper.