GRADE 9 SCIENCE

Matter and Chemical Change Review Questions

There is a periodic table attached to the back if you need it.

1. Marble buildings are affected by acid rain. Calcium chloride, carbon dioxide and

water are products formed when marble (CaCO3) reacts with the acid. The

equation that describes this reaction is

A. CaCl2 + H2O ( CaCO3 + 2HCl + CO2

B. H2O + 2HCl ( CaCl2 + CO2 + CaCO3

C. CaCO3 + 2HCl ( CaCl2 + 2H2O + CO2

D. CaCO3 + H2O ( CaCl2 + 2HCl + CO2

2. The corrosion reaction can be written as: Iron + Oxygen ( Iron oxide. In this

reaction, iron is _X__ and iron oxide is __Y_.

X

Y

A.

An acid

A base

B.

A reactant

A product

C.

Endothermic

Exothermic

D.

A compound

An element

3. In the electrolysis of water, two gases are produced. One of the gases is twice

as abundant as the other. The more abundant gas is

A. Oxygen

B. Nitrogen

C. Hydrogen

D. Carbon dioxide

4. If the chemical formula for magnesium phosphate is MgxPy, the numerical value

of X and Y would be, respectively,

A. 2, 3

B. 3, 2

C. 1, 2

D. 2, 1

The following statements were found on chemical containers in a lab:

1. This test tube contains e-coli. Handle with care.

2. Store this chemical separately from acids.

3. Store this chemical away from any open flames.

4. Highly corrosive. Avoid contact with skin or eyes.

Match the number of the statement with the correct WHMIS symbol below.

________ ________ ________ ________

5. An experiment required 2 g of baking soda to be placed in a 3.1 g plastic bag.

Vinegar was added to the contents in the bag and the bag was sealed. After the

reaction was completed, the bag and contents had a mass of 12.6 g. How many

grams of vinegar were added to the bag?

A. 5.1 g

B. 7.5 g

C. 12.6 g

D. 21.2 g

6. A positive ion of this element would have

A. 10 electrons

B. 11 electrons

C. 12 electrons

D. 23 electrons

Use this information to answer the following question.

7. The evidence that the crystalline substance underwent a physical change is that

A. some of the water turned white

B. not all of the substance disappeared

C. the change produced heat

D. the change could be reversed

Calcium chloride (CaCl2) is a common household chemical. Fill in the numbers

that correctly describe this substance.

____________ ____________ _____________ _____________

number of number of number of number of

calcium atoms molecules different elements chlorine atoms

Use this diagram to answer the following question.

8. This chart represents a key for classifying matter. What does the category

labeled “A” represent?

A. A compound

B. A pure substance

C. A solution

D. A mechanical mixture

Use this chart to answer the next question.

Temperature of Acid (°C)

Time to Complete Reaction (s)

2

126

34

32

26

?

86

11

9. According to the results obtained, a realistic time of the reaction at 26°C would be (Hint: sketch a graph)

A. 46 s

B. 22 s

C. 138 s

D. 86 s

Use the information on this table to answer the next question.

10. A baker found an unlabelled can of white powder. When he adds vinegar to the

unknown powder, it fizzes. Based on the information in the table, which

conclusion about the unknown powder is valid?

A. The powder is baking soda, and no more information is needed.

B. The powder could be cornstarch, but more information is needed.

C. The powder could be baking soda, but more information is needed.

D. The powder is baking powder, and no more information is needed.

Use this chart to answer the following question.

Number

Compound

Melting Point (°C)

Boiling Point (°C)

1

Baking soda

455

1550

2

Water

0

100

3

Rubbing alcohol

-90

Decomposes

4

Salt

804

1413

11. With a good knowledge of common properties of compounds, Janine was able to

identify the molecular compounds as numbers

A. 2 and 4

B. 3 and 4

C. 1 and 4

D. 2 and 3

Use this diagram to answer the following question.

12. “It’s like shooting a gun shell at a piece of tissue paper and it comes right back

at you.” These famous words were said by ______________________ after

he completed the experiment shown above.

A. Bohr

B. Dalton

C. Thomson

D. Rutherford

The burning of methane gas can be illustrated using a chemical equation.

Several statements about this reaction were jotted down on paper by a group

of students doing this experiment.

A. has two reactants

B. in endothermic

C. a product is carbon dioxide

D. is an example of corrosion

Write a “1” if the statement is correct and “2” if the statement if incorrect.

________ ________ ________ ________

A B C D

13. Several compounds are listed below.

I. Beryllium oxide

II. Lithium phosphide

III. Sodium fluoride

IV. Carbon dioxide

From this list, the ionic compounds are

A. I, II and III

B. II, III and IV

C. I, II and IV

D. I, III and IV

14. A mechanic adds ethylene glycol (antifreeze) to a car’s radiator. Ethylene

glycol is produced when ethylene is reacted with oxygen and water. Which of

the following word equations describes this reaction?

A. Ethylene glycol ( water + oxygen + ethylene

B. Water + oxygen ( ethylene + ethylene glycol

C. Oxygen + water + ethylene ( ethylene glycol

D. Ethylene + water ( ethylene goycol + water

15. A molecular compound, carbon dioxide, can be illustrated as

Use this information to answer the following numerical response question.

The following list shows chemical equations for some common reactions.

1. iron + water + acid ( iron oxide

2. magnesium + oxygen ( magnesium oxide + carbon dioxide + water

3. hydrochloric + ammonia ( ammonia chloride + water

4. sodium chloride + nitrogen oxide ( sodium oxide + nitrogen chloride

Match the chemical equation with the type of reaction below.

__________ __________ __________ __________

replacement combustion acid/base corrosion

16. Baking soda and vinegar are mixed in a stoppered test tube. Before the test,

the following masses were recorded.

Test tube50 g

Stopper10 g

Vinegar15 g

Baking soda 9 g

The mass of just the products from this reaction would be

A. 84 g

B. 60 g

C. 24 g

D. 22 g

17. The chemical name for rust is Iron III oxide. Knowing that the ionic charge

for Iron III is 3+, the formula for rust would be

A. FeO

B. Fe2O

C. Fe2O3

D. FeO2

18. The chemical formula for magnesium phosphide is

A. MgP

B. MgP2

C. Mg2P3

D. Mg3P2

19. This chart appeared in a chemistry textbook:

Element

Symbol

Atomic Number

Atomic Mass

13

27

After examining the chart, Bryce concluded that the element represented is

A. silicon

B. argon

C. arsenic

D. aluminum

Use this information to answer the next question.

20. Based on this information, you could conclude that

A. photosynthesis is an exothermic reaction while cellular respiration is endothermic.

B. both photosynthesis and cellular respiration are exothermic reactions.

C. both photosynthesis and cellular respiration are endothermic reactions.

D. photosynthesis is an endothermic reaction while cellular respiration is exothermic.

According to the law of conservation of mass, how much hydrogen gas is

formed from this reaction?

Reactants

Products

Chemical

Magnesium strip Hydrochloric acid

Magnesium chloride Hydrogen gas

Mass

3.2 g 26.2 g

28.6 g ?

_______ ______ ______ ______ g

Use this information to answer the following question.

21. Which of these tables would be the best to use to record the results of this

experiment?

Drops of Acid

Length of Zinc (cm)

Reaction Time (s)

2

4

8

20

A.

Test Tube

Drops of Acid

Reaction Time (s)

W

X

Y

Z

B.

Test Tube

Water Used (mL)

Length of Zinc (cm)

Drops of Acid

W

X

Y

Z

C.

Test Tube

Water Used (mL)

Length of Zinc (cm)

Reaction Time (s)

W

X

Y

Z

D.

22. If the chemical formula for beryllium phosphide is MgxCly, the number of

atoms of Mg (x) and Cl (y) would be, respectively,

A. 2, 3

B. 3, 2

C. 1, 2

D. 2, 1

23. Adding baking soda to vinegar is considered to be a chemical change because

the process

A. cannot be reversed

B. can be reversed

C. results in a colour change

D. involves a state change

24. You want to make sure that the Alka-Seltzer tablet you are about to take for an upset stomach begins working as quickly as possible. The best way to ensure this is to

A. add it to very cold water

B. break the tablet up before putting it in water

C. dilute the solution with additional water

D. swallow the tablet whole

25. You have been given an assignment to find three household items that are considered hazardous. Your items include Draino Drain Cleaner, Pledge Furniture Polish and Lighter Fluid for the barbecue pit. The labels on these items would be, respectively

A.

B.

C.

D.

26. This container should be kept away from

A. acids

B. bases

C. heat

D. gases

Match the chemical formula to its molecular structure.

________ ________ ________ ________

NH3 HF CH4 O2

27. Students were doing an experiment to prove conservation of mass theory. Each

group mixed baking soda and vinegar in a test tube. The results are shown in

the table below.

Group A Results

Group B Results

Mass of Reactants (g)

Mass of Products (g)

Mass of Reactants (g)

Mass of Products (g)

10.0

10.0

10.0

9.8

The most likely reason for the data discrepancy is that

A. group B spilled some of the content of the test tube

B. group A weighed their ingredients incorrectly

C. group B did not cover the test tube during the reaction

D. group B used a scale that was more accurate

28. Fuel cells have been developed for space exploration but this technology is now

being looked at as a clean alternative energy source. The reaction that occurs

inside of a fuel cell is summarized as

H2O(l) ( H2(g) + O2(g)

This reaction is a chemical change since

A. the gases can be easily recombined into water

B. it involved a change in state

C. a gas is formed

D. new products are created

29. When you put a cold drink out on a hot day, water droplets appear on the

outside of the glass. The gas from the air is changing to a liquid and since you

are going from a higher energy state (gas) to a lower energy state (liquid)

some heat is released. This process can be classified as

A. exothermic and chemical

B. endothermic and chemical

C. exothermic and physical

D. endothermic and physical

30. Protons are ____________________ charged and have _______________.

A. positively, mass

B. negatively, no mass

C. neutrally, mass

D. positively, no mass

31. According to the periodic table, elements that form ions with a 2+ and 2-

charge would be, respectively, from groups

A. 1 and 17

B. 2 and 16

C. 3 and 15

D. 4 and 14

Use this information to answer the following question.

The following lab observations were recorded during class experiments:

1. The steel wool turned reddish brown when placed in Copper II sulfate.

2. The sprain pack turned cold when the contents mixed together.

3. When cabbage juice indicator was added to the solution, it turned pink.

4. After toasting, the bread looked different that it had before.

Match the observation with the chemical reaction that best identifies it.

__________ __________ __________ __________

oxidation corrosion acid/base endothermic

Use this chart to answer the following question.

Unknown Substance

Boiling Point ((C)

Melting Point

((C)

Density

(g/cm2)

Solubility

(mg/L)

Calcium chloride

33

7

54

15

Sodium chloride

80

41

27

2

Potassium carbonate

102

39

19

25

Lithium sulfide

71

20

42

38

32. An unknown powder is found in a lab and the scientist wants to determine its

identify. He takes some of the powder and heats it to 40(C when it melts. He

also discovers that it dissolves easily in water. Based on the chart above, the

substance would most likely be

A. calcium chloride

B. sodium chloride

C. potassium carbonate

D. lithium sulfide

33. Although Copper I chloride and Copper II chloride are very similar, their chemical formula is different. Copper can have and ionic charge of 1+ or 2+ and chlorine has an ionic charge of 1-. Based on this information, the chemical formulas for Copper I chloride and Copper II chloride are, respectively,

A. CuCl, CuCl2

B. Cu2Cl, Cu3Cl

C. Cu2Cl3, Cu3Cl2

D. Cu3Cl2, Cu2Cl3

34. The chemical formula for sodium sulphide is

A. NaS2

B. NaS

C. Na2S3

D. Na2S

The following statements refer to the classification of matter.

1. composed of one kind of atom

2. composed of two or more kinds of elements combined into a molecule

3. homogeneous mixture

4. made up of visibly different materials

Match the statement with the classification it refers to.

__________ __________ __________ ___________

element solution compound mechanical mixture

Use the following graph to answer the next question.

35. In an experiment, different temperatures of Hydrochloric acid and pieces of magnesium strip were reacted together. For each of the different reactions, gas was released and collected. The volume of the gas was measured and the results are shown on the graph above. The test that was done at the highest temperature would have been

A. 1

B. 2

C. 3

D. 4

36. The chemical names for Li3N2 and NO3 are, respectively,

A. Trilithium dinitride, Nitrogen oxide

B. Nitrogen lithide, Nickle dioxide

C. Lithium nitride, Nitrogen trioxide

D. Dinitrogen trioxide, Nickle oxide

37. Reaction rate can be increased through all of the following:

I. increased temperature

II. increased surface area

III. increased concentration

IV. adding an enzyme

This particle model illustration shows which of the above condition?

A. I

B. II

C. III

D. IV

Use these element information boxes from

a periodic table to answer this

question.

The total mass of a molecule of CO2

would be

_____ _____ _____ _____ amu

(Round to the nearest tenth

of an atomic mass unit)

38. As you move from the left side of the periodic table to the right side, the elements become

A. less metallic

B. liquid

C. more conductive

D. solid in state

39. Precipitated copper and zinc sulphate solution can be found in a test tube after zinc is added to Copper II sulphate solution. The chemical equation that represents this reaction is

A. Cu(s) + ZnSO4(l) ( Zn(s) + CuSO4(l)

B. Zn(s) + SO4(l) ( SO4(l) + CuZn

C. ZnCu(s) + SO4(l) ( CuSOZn(s)

D. Zn(s) + CuSO4(l) ( ZnSO4(l) +Cu(s)

40. Which of the following formulas is written correctly?

A. LiCl2

B. NaF3

C. Al2S3

D. Ca3O

Match the following formulas to their chemical name below.

1. CaCl2

2. Be3N2

3. NaCl

4. K2S

__________ __________ __________ __________

beryllium nitrate sodium chloride potassium sulfide calcium chloride

Use this diagram to answer the next question.

41. After reading the labels on these bottles, you conclude that as the percentage

of H2O2 in water decreases, the solution becomes

A. less flammable

B. more concentrated

C. more corrosive

D. less poisonous

42. The reaction between the chemicals in a glow stick will

cause it to glow brightly. The reaction that occurs

between these chemicals is an example of a

A. physical change in which energy is absorbed

B. physical change in which energy is released

C. chemical change in which energy is absorbed

D. chemical change in which energy is released

43. Which of the symbols would a consumer recognize as indicating a product that

is the most dangerous of the four?

1 1+

H

Hydrogen

1.0

2

He

Helium

4.0

3 1+

Li

Lithium

6.9

4 2+

Be

Beryllium

9.0

5 3+

B

Boron

10.8

6 4+

C

Carbon

12.0

7 3-

N

Nitrogen

14.0

8 2-

O

Oxygen

16.0

9 1-

F

Fluorine

19.0

10

Ne

Neon

20.2

11 1+

Na

Sodium

23.0

12 2+

Mg

Magnesium

24.3

13 3+

Al

Aluminum

27.0

14 4+

Si

Silicon

28.1

15 3-

P

Phosphorus

31.0

16 2-

S

Sulfur

32.1

17 -1

Cl

Chlorine

35.5

18

Ar

Argon

39.9

19 1+

K

Potassium

40.1

20 2+

Ca

Calcium

40.1

21

Sc

22

Ti

23

V

24

Cr

25

Mn

26

3+, 2+

Fe

Iron

55.8

27

Co

28

Ni

29

1+, 2+

Cu

Copper

63.5

30

Zn

31 3+

Ga

Gallium

69.7

32 3-

Ge

Germanium

72.6

33 3-

As

Arsenic

74.9

34 2-

Se

Selenium

79.0

35 1-

Br

Bromine

79.9

36

Kr

Krypton

83.8

Numerical Response

1

11 +1

Na

Sodium

22.9

While a camp waste pit is being excavated, you notice a white, crystalline substance. You decide to find out what the substance is before removing it. When mixed with water, some of the substance disappears. You put some of the solution on a plate, and when the liquid evaporates, the crystals reappear.

Numerical Response

2

Numerical Response

3

CH4 + 2O2 ( 2 H2O + CO2 + heat energy

Numerical Response

4

Photosynthesis: carbon dioxide + water + sunlight ( sugar + carbon

Respiration: sugar + oxygen ( carbon dioxide + water + energy

Numerical Response

5

A student set up an experiment to determine the reaction time between zinc and HCl. Into each of four test tubes, he put 15 mL of HCl and a 3 cm piece of zinc. Then, he added the following amounts of acid:

Test tube W�

2 drops�

�

Test tube X�

4 drops�

�

Test tube Y�

8 drops�

�

Test tube Z�

20 drops�

�

A timer was started when the acid was added and stopped when the reaction stopped bubbling.

Numerical Response

6

Numerical Response

7

Numerical Response

8

Volume of gas

(mm3)

1 2 3 4

Test Number

Numerical Response

9

8

O

Oxygen

16.00

6

C

Carbon

12.1

Numerical Response

10

D.

C.

B.

A.

Non-metals

Metalloids

Metals

Non-metals

Metalloids

Metals

1 2 3(13) 4(14) 5(15) 6(16) 7(17) 8(18)

1

2

3

4

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