Demonstrate an understanding of the different types of chemical reactions.
1. Balance the following chemical reactions:
a. Mg + O2
→ MgO
b. Cu2
O + H3
PO4 → Cu3
PO4 + H2
O
c. (NH4
)
2
S + CoCl3 → Co2
S3 + NH4
Cl
2. Identify each of the following reactions as synthesis, decomposition, single displacement, or double displacement.
a. aluminum bromide + chlorine → aluminum chloride + bromine
Copyright © 2021 The Ontario Educational Communications Authority. All rights reserved.
SCH3U Learning Activity 2.6
Assessment for feedback and grade: Chemical reactions and stoichiometric relationships
TVO ILC
2
b. beryllium carbonate → beryllium oxide + carbon dioxide
c. aluminum + chlorine → aluminum chloride
d. ammonium chloride + mercury(I) acetate → ammonium acetate + mercury(I) chloride
3. Complete the following neutralization reactions. Word equations should be completed
as word equations, and chemical equations should be completed as balanced chemical
reactions.
a. sulphuric acid + lithium hydroxide →
b. KOH + H2
SO4 →
4. For one of the fuels in gasoline, pentane (C5 H ), complete the following combustion 12
reactions. Make certain your equations are balanced.
a. complete combustion C5 + O2 H12 →
b. incomplete combustion C5 + O2 H12 →
Overall expectation 2: I can investigate different types of chemical reactions.
5. For each of the following chemical reactions, identify the type of reaction based on the
reactants present. Write chemical formulas for the expected products and state one
qualitative observation that an observer would expect to see. (In all cases, a reaction will
occur. There is no need to balance these chemical reactions.)
Type of reaction? Reactants Products Potential qualitative evidence
Li(s) + O2 (g) →
+ Cu(NO3 Fe(s) )2 (aq) →
NaCl(s) →
CH4 (g) + O2 (g) →
Copyright © 2021 The Ontario Educational Communications Authority. All rights reserved.
SCH3U Learning Activity 2.6
Assessment for feedback and grade: Chemical reactions and stoichiometric relationships
TVO ILC
3
6. Use both the metal and the halogen activity series to predict whether each of the
following reactions will occur. Write the formulas for the products and balance the
equation, if the reaction does take place.
a. AgNO3 + Zn →
b. Cl2 + NaI →
c. Fe + Al2
O3
Overall expectation 3: I can analyze chemical reactions used in a variety of applications,
and assess their impact on society and the environment.
7. Many iron-containing alloy parts, such as ductwork in your home, mufflers on your
vehicle, and hardware used in construction, are galvanized (coated with zinc).
a. What is the purpose of galvanizing these parts?
b. Explain your answer to part a, using the activity series. One or two sentences will
suffice.
8. In Ontario, some electricity comes from coal-burning generators. Coal is a natural form
of carbon that has a large amount of sulphur mixed in with it. Here are the balanced
equations for the combustion of coal and sulphur:
carbon + oxygen → carbon dioxide
C + O2
→ CO2
sulphur + oxygen → sulphur dioxide
S + O2
→ SO2
Answer the following questions based on the burning of coal to produce energy:
Copyright © 2021 The Ontario Educational Communications Authority. All rights reserved.
SCH3U Learning Activity 2.6
Assessment for feedback and grade: Chemical reactions and stoichiometric relationships
TVO ILC
4
a. In what way is the combustion of sulphur harmful to the environment?
b. Write the word equation and balanced chemical equation for the reaction that
produces this harmful environmental effect.
9. Furnaces in residential homes usually burn natural gas, which is mostly methane, CH4
.
Here is the balanced equation for the complete combustion of methane:
CH4
+ 2O2
→ CO2
+ 2H2
O
a. Explain why it is important to make sure your furnace is serviced and in proper
working order before the winter. Be sure to include information about combustion
reactions in your answer.
b. What safety precautions should you take if your house has a furnace?
Copyright © 2021 The Ontario Educational Communications Authority. All rights reserved.
SCH3U Learning Activity 2.6
Assessment for feedback and grade: Chemical reactions and stoichiometric relationships
TVO ILC
5
10. Recently, the European Union considered labelling crude oil from the oil sands in Alberta
“dirty” as it produces more greenhouse gases in obtaining it compared to other methods
of obtaining oil. This would make Alberta oil less welcome in European refineries. It
would be a blow to the industry if European countries reduced the amount of oil they
purchased from the oil sands. Use print and electronic sources to research this issue.
Do you agree or disagree that the oil should be labelled as “dirty”? Explain your position.
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