Chapter 2 - Matter and Change

Question 1

What is a quality or condition of a substance that can be observed without changing the composition?

Answer 1

physical property

Question 2

What is a homogeneous mixture?

Answer 2

solution

Question 3

What is a substance that is formed in a chemical reaction?

Answer 3

products

Question 4

What is a physical blend of 2 or more substances?

Answer 4

mixture

Question 5

What is the starting substances in a chemical reaction?

Answer 5

reactants

Question 6

What is the part of a sample with uniform composition and properties?

Answer 6

phase

Question 7

What is a study of composition of substances and the changes?

Answer 7

chemistry

Question 8

What is matter that takes both the shape and volume of the container?

Answer 8

gas

Question 9

What is the simplest form of matter that can exist under normal lab conditions?

Answer 9

elements

Question 10

What substance can only be separated into simpler substances by chemical reaction?

Answer 10

compounds

Question 11

What occurs when iron and oxygen combine to form iron oxide (rust)?

Answer 11

a chemical change

Question 12

What distinguishes a physical change from a chemical change?

Answer 12

Mass is conserved

Question 13

Give an example of a compound

Answer 13

Water - H2O

Question 14

Give an example of a chemical change

Answer 14

rotting meat

Question 15

What is the chemical symbol of sodium

Answer 15

Na

Question 16

What is the chemical symbol of potassium

Answer 16

K

Question 17

What is the chemical symbol of silver

Answer 17

Ag

Question 18

What are the three states of matter?

Answer 18

Solid, liquid, gas

Question 19

What is gas?

Answer 19

A form of matter that takes the shape and volume of the container

Question 20

Give some examples of physical changes?

Answer 20

1. cutting and grinding of meat
2. freezing and melting of water
3. Boiling and condensing of water

Question 21

When does a chemical change occur in a piece of wood?

Answer 21

When it decays

Question 22

What are some characteristics of a substance in the liquid state?

Answer 22

1. able to flow
2. not easily compressed
3. definite volume

Question 23

Is dissolving salt in water a chemical change?

Answer 23

NO

Question 24

Can ELEMENTS be separated into simpler substances by chemical reactions?

Answer 24

NO

Question 25

Does a heterogeneous mixture have 2 or more phases?

Answer 25

YES

Question 26

Is color an example of intensive property?

Answer 26

NO

Question 27

What are the four signs that a chemical reaction may have occurred?

Answer 27

1. Gas is created 2. There is a color change 3. There is an energy change - temperature 4. A Precipitate forms

Question 28

Be prepared if the following is a homogeneous mixture, heterogeneous mixture, compound or element: ``` vegetable soup table sugar apple juice tap water marble table salt hydrogen ```

Answer 28

``` Vegetable soup - - heterogeneous mixture table sugar - - compound apple juice - - homogeneous mixture tap water - - homogeneous mixture marble - - heterogeneous mixture table salt - - compound hydrogen - - element ```

Question 29

Be prepared to state if the following is a physical change or a chemical change: ``` dissolving sugar water evaporating spoiled milk digesting food burning a match carving a piece of wood ```

Answer 29

``` dissolving sugar - - physical water evaporating - - physical spoiled milk - - chemical digesting food - - chemical burning a match - - chemical carving a piece of wood - - physical ```

Question 30

Be able to STATE the Law of Conservation of Mass.

Answer 30

In a physical or chemical reaction - mass is neither created or destroyed in is CONSERVED!!

Question 31

Tell how you would separate water and alcohol.

Answer 31

Distillation - - boil the alcohol and water - the water will turn into a vapor and rise into a tube where is will condenses back into a liquid

Question 32

Tell how you would separate sand and salt

Answer 32

Use water to dissolve salt - then use a filter paper to remove the sand from the water - let the water evaporate and the salt will be left behind

Question 33

Tell how you would separate iron filings and lead

Answer 33

use a magnet to pull the iron filings out | iron is magnetic and lead is NOT

Question 34

In a lab you started with a purple powder and added HCl - the purple powder fizzed and produced a white substance. Was the purple powder a compound or and element?

Answer 34

A compound - - because is was broken down into a simpler substance - it is NOT possible with and element.

Question 35

What is the element of H?

Answer 35

Hydrogen

Question 36

What is the symbol of Gold?

Answer 36

Au

Question 37

What is the symbol of Lead?

Answer 37

Pb

Question 38

What is the element of C?

Answer 38

Carbon

Question 39

What is the symbol of Nickel?

Answer 39

Ni

Question 40

What is the element of Sb?

Answer 40

Antimony

Question 41

Be able to fill in the MATTER chart

Answer 41

See Mrs. Krumpelman for help