Lecture 1 & 2 Matter

Question 1

Define Matter

Answer 1

Anything that occupies space and has mass.

Question 2

List the 3 states of Matter

Answer 2

Solid, liquid and gas.

Question 3

Explain a Solid

Answer 3

• Rigid (not flexible)
• fixed vol & shape

Question 4

Explain a Liquid

Answer 4

• Definite vol (fixed)
• Assumes shape of container

Question 5

Explain a Gas

Answer 5

• No fixed vol or shape
• takes the shape & vol of its container

Question 6

Define Physical Properties

Answer 6

Observable characteristics

Question 7

Define Chemical Properties

Answer 7

Characteristics that describe the behavior of matter (Chemical reactions).

Question 8

What two categories can matter be divided into?

Answer 8

Pure substances and mixtures.

Question 9

Define Pure Substances

Answer 9

Fixed composition (same throughout); can’t be further purified.

Question 10

Define Mixtures

Answer 10

A combo of two or more pure substances.

Question 11

What are the two categories of pure substances?

Answer 11

Elements and compounds.

Question 12

Define Elements

Answer 12

Can’t be subdivided by chemical or physical means.

Question 13

Define Compounds

Answer 13

Elements united in fixed ratios.

Question 14

What can elements combine chemically to form?

Answer 14

Compounds

Question 15

What can mixtures be physically separated into?

Answer 15

Pure substances

Question 16

What are the two categories of mixtures?

Answer 16

Homogeneous and Heterogeneous.

Question 17

Define Homogeneous

Answer 17

Uniform composition throughout (mixed evenly throughout)

Question 18

Define Heterogeneous

Answer 18

Non uniform composition (not evenly mixed throughout)

Question 19

List the 4 separation of mixtures techniques

Answer 19

Distillation, filtration, chromatography and evaporation

Question 20

What is the physical property for distillation?

Answer 20

Boiling point

Question 21

What is the physical property for filtration?

Answer 21

State of matter (s, l, g)

Question 22

What is the physical property for chromatography?

Answer 22

Adherence to a surface

Question 23

Define Chromatography

Answer 23

A technique of separation of a mixture into its components.

Question 24

What is the physical property for evaporation?

Answer 24

Volatility (how easy it vaporizes)

Question 25

Define Density

Answer 25

A substance’s mass per unit of volume.

Question 26

What is the formula for calculating density?

Answer 26

Density (p) = mass (m) / vol (v)

Question 27

Define sublimation

Answer 27

Solid to gas missing the middle phase of liquid.