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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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