1.

Question

(03.06 LC)

Heterogeneous mixtures can be physically separated into their individual components. (2 points)

True

False
2.
(03.06 LC)

Match the term with its description. (4 points)
1.
Pure substance
2.
Homogeneous
3.
Solution
4.
Heterogeneous
a.
Consists of a single element or type of compound
b.
Mixture that has its different components mixed unevenly within the substance
c.
Mixture that has its different components mixed evenly within the substance
d.
Liquid homogeneous mixture in which the solute is distributed evenly within the solvent
3.
(03.06 MC)

Which substance is a pure substance? (3 points)

Cereal

Silver

Jelly bean

Shampoo
4.
(03.06 LC)

Which of the following techniques can be used to separate a homogeneous mixture into its component parts? (3 points)

Sort by color

Sort by size

Separation by density

Use magnetism
5.
(03.06 MC)

What makes a pure substance different from a heterogeneous mixture? (4 points)

The components of a pure substance are mixed unevenly instead of evenly within the pure substance.

Insoluble instead of soluble particles are suspended within the pure substance.

Two liquids that normally are not mixable are mixed in a heterogeneous mixture.

The components of a pure substance are single elements or compounds instead of a mixture of compounds.
6.
(03.06 MC)

A chemical reaction was used to separate a sample into its components. What conclusion about the sample can be formed based on the technique used? (4 points)

It was a pure substance.

It was a compound.

It was a heterogeneous mixture.

It was a homogeneous mixture

Answer 1

1. True - Heterogeneous mixtures can indeed be physically separated into their individual components.

2. 1. Pure substance - a. Consists of a single element or type of compound
   2. Homogeneous - c. Mixture that has its different components mixed evenly within the substance
   3. Solution - d. Liquid homogeneous mixture in which the solute is distributed evenly within the solvent
   4. Heterogeneous - b. Mixture that has its different components mixed unevenly within the substance

3. Silver - Silver is a pure substance, while cereal, jelly beans, and shampoo are all mixtures.

4. Separation by density - This technique can be used to separate homogeneous mixtures into their component parts. The other methods listed (sort by color, sort by size, and use magnetism) are more suited for heterogeneous mixtures.

5. The components of a pure substance are single elements or compounds instead of a mixture of compounds. - This is the defining characteristic that distinguishes pure substances from heterogeneous mixtures.

6. It was a compound. - If a chemical reaction was required to separate the sample into its components, it implies that the sample was a compound.