Chemical Reactions
Chemical Reactions
“Success is not the result of spontaneous
combustion. You must set yourself on fire”
Fred Shero, Coach - Philadelphia Flyers
Section 1A – Chemical Reactions Must Know Vocabulary!
Below is a list of the vocabulary terms used in this unit. By the end of the unit, you
should be able to write a working definition of each term and correctly use each
term in a sentence.
activity series of metals
aqueous solution
balanced equation
catalyst
chemical equation
chemical reaction
coefficient
 combination reaction
 combustion reaction
 decomposition reaction
 double replacement
reaction
 gas (↑)
 gas (g)
 law of conservation of




liquid (l)
precipitate (↓)
product
reactant
 single replacement reaction
 solid (s)

energy
Section 1B –– Mastery Objectives and Critical Skills
 Given a description of a chemical reaction. write and balance the chemical
equation that describes it
 Given a chemical equation or a description of a chemical reaction, identify which
type it is.
 Write net ionic equations for aqueous chemical reactions
Section 2A –Required Readings covered on Tests and Quizzes
Wilbraham, Staley, Matta, Waterman pp202-223
Section 2B –Websites to help with OCAs and Extend Your
Knowledge
see the wiki for current listings of key URLS
Chemical Reactions
Section 3 –Anticipated In Class Activities
1) Lecture & Demonstrations
2) Student Labs
a) Modeling Chemical Reactions
b) Reaction Types – Completion and Balancing
c) Activity Series of Metals
d) Precipitation Reactions
Section 4 –– Outside Class Assignments
Thoughtfully answer each of the following questions or comments. Include all your
reasoning and show all your work wherever it is appropriate. To receive any credit for
a question, your answer must be a correctly numbered restatement of the question or
statement followed by a series of complete sentences. No phrases, partial answers or
isolated numbers will be given credit! Your answer must stand alone without the reader
knowing the question asked or statement made.
Due dates for each assignment will be given in class. (Please remember - homework
that is passed in late – not when collected during class) is automatically discounted 15%
of total possible points.)
1) Create a concept map for each of the following groups of terms
a) Reactants, products, chemical reaction, law of conservation of mass,
chemical equation, coefficients, balanced equation
b) Single displacement reaction, double displacement reaction, decomposition,
combustion, combination reaction, reactions of aqueous solution, spectator
ions
2) List 5 factors that you might use to determine whether a chemical reaction has
occurred when 2 or more substances are mixed in a container.
3) Write an unbalanced equation for each of the following:
a) Carbon dioxide combines with water to form glucose and oxygen gas.
b) Sulfur burns in oxygen gas to form sulfur dioxide.
c) Ammonia reacts with iodine to form nitrogen triodide and hydrogen gas.
d) Propane burns in the presence of oxygen gas to form carbon dioxide and
water
e) Nitric acid reacts with potassium hydroxide to form potassium nitrate and
water.
f) Iron reacts with oxygen gas (rusts) to form iron (III) oxide.
g) Hydrogen peroxide spontaneously decomposes into water and oxygen gas.
Chemical Reactions
4) Examine problem #3a again.
a) Re write the unbalanced equation
b) As if you were teaching a fellow chemistry student, write down each of the
steps you took to balance this equation.
c) If you were to generalize the steps for balancing an equation, what would
they be?
d) Are there any exceptions to this order or number of steps?
5) Balance each of the remaining unbalanced equations you wrote in #3 above.
6) For more practice writing and balancing equations, complete the Writing and
Balancing Equations Worksheet. (see attached)
7) For even more practice balancing equations, try #8 on p211 in your chemistry
textbook.
8) You have just spent time balancing a number of equations.
a) Why do chemists balance equations?
b) How does balancing a chemical equation relate to the law of conservation of
matter? Explain your answer using the chemistry terms atoms, molecules,
coefficients and mass.
9) Now that you are familiar with the five types of chemical reactions, use your
annotated table and other information in your tool kit to determine the reaction
type of each of the following:
a) 2H2C2O4 + O2  4CO2 + 2H2O
b) 2KCl + 3O2  2KClO3
c) 2NaCl  2Na Cl2
d) Ca(OH)2  CaO + H2O
e) Na2O + H2O  2NaOH
f) CaCO3 + HCL  CaCl2 + CO2 + H2O
g) CH4 + 2O2  CO2 + 2H2O
h) AgNO3 + NaCl  AgCl + NaNO3
10) Double displacement reactions will only occur if certain types of products are
produced, what are these types of products?
11) For more practice identifying reaction types and predicting products, complete
the Worksheet A Voyage through Equations from Cavalcade Publishing. (see
attached)
Chemical Reactions
12) For even more practice identifying reaction types and predicting products,
complete the Worksheet Reaction Type Review I and II. (see attached)
13) So far we have been working with reactants and predicting products. In this
problem, write down a chemical reaction that could produce each of these
products.
a) Carbon dioxide
b) Ammonium hydroxide
c) Silver carbonate
d) Acetic acid
e) Calcium phosphate