Chapter 2, Problem 2.85P

a)

Interpretation Introduction

Interpretation:Whether distilled water is a compound, homogeneous mixture or a heterogeneous mixture should be classified.

Concept introduction:Compounds are substances that are composed of at least two or more than two elements bound chemically in fixed proportions. They are represented by their chemical compositions. Compounds can be fragmented into its constituents by chemical methods. Examples of compounds are water $\left({\text{H}}_{\text{2}}\text{O}\right)$ , common salt $\left(\text{NaCl}\right)$ , carbon dioxide $\left({\text{CO}}_{\text{2}}\right)$ .

Mixtures consist of two or more chemical compounds or elements that are mixed up physically, they are not pure substances. Examples of mixtures are air, milk, honey. Based on composition, mixture can be classified into two categories one is a homogeneous mixture (uniform mixture) and another one heterogeneous mixture (ununiform mixture).

b)

Interpretation Introduction

Interpretation:Whether gasoline is a compound,homogeneous mixture or a heterogeneous mixture should be classified.

Concept introduction:Compounds are substances that are composed of at least two or more than two elements bound chemically in fixed proportions. They are represented by their chemical compositions. Compounds can be fragmented into its constituents by chemical methods. Examples of compounds are water $\left({\text{H}}_{\text{2}}\text{O}\right)$ , common salt $\left(\text{NaCl}\right)$ , carbon dioxide $\left({\text{CO}}_{\text{2}}\right)$ .

Mixtures consist of two or more chemical compounds or elements that are mixed up physically, they are not pure substances. Examples of mixtures are air, milk, honey. Based on composition, mixture can be classified into two categories one is a homogeneous mixture (uniform mixture) and another one heterogeneous mixture (ununiform mixture).

c)

Interpretation Introduction

Interpretation:Whether beach sand is a compound, homogeneous mixture or a heterogeneous mixture, that should be classified.

Concept introduction:Compounds are substances that are composed of at least two or more than two elements bound chemically in fixed proportions. They are represented by their chemical compositions. Compounds can be fragmented into its constituents by chemical methods. Examples of compounds are water $\left({\text{H}}_{\text{2}}\text{O}\right)$ , common salt $\left(\text{NaCl}\right)$ , carbon dioxide $\left({\text{CO}}_{\text{2}}\right)$ .

Mixtures consist of two or more chemical compounds or elements that are mixed up physically, they are not pure substances. Examples of mixtures are air, milk, honey. Based on composition, mixture can be classified into two categories one is a homogeneous mixture (uniform mixture) and another one heterogeneous mixture (ununiform mixture).

d)

Interpretation Introduction

Interpretation: Whether wine is a compound, homogeneous mixture or a heterogeneous mixture, that should be classified.

Concept introduction:Compounds are substances that are composed of at least two or more than two elements bound chemically in fixed proportions. They are represented by their chemical compositions. Compounds can be fragmented into its constituents by chemical methods. Examples of compounds are water $\left({\text{H}}_{\text{2}}\text{O}\right)$ , common salt $\left(\text{NaCl}\right)$ , carbon dioxide $\left({\text{CO}}_{\text{2}}\right)$ .

Mixtures consist of two or more chemical compounds or elements that are mixed up physically, they are not pure substances. Examples of mixtures are air, milk, honey. Based on composition, mixture can be classified into two categories one is a homogeneous mixture (uniform mixture) and another one heterogeneous mixture (ununiform mixture).

e)

Interpretation Introduction

Interpretation:Whether air is a compound, homogeneous mixture or a heterogeneous mixture, that should be classified.

Concept introduction:Compounds are substances that are composed of at least two or more than two elements bound chemically in fixed proportions. They are represented by their chemical compositions. Compounds can be fragmented into its constituents by chemical methods. Examples of compounds are water $\left({\text{H}}_{\text{2}}\text{O}\right)$ , common salt $\left(\text{NaCl}\right)$ , carbon dioxide $\left({\text{CO}}_{\text{2}}\right)$ .

Mixtures consist of two or more chemical compounds or elements that are mixed up physically, they are not pure substances. Examples of mixtures are air, milk, honey. Based on composition, mixture can be classified into two categories one is a homogeneous mixture (uniform mixture) and another one heterogeneous mixture (ununiform mixture).