Calculating Rates and Orders of Reactions
SCH 3U0- Lindsay Brown
Big Ideas
Materials
-Energy changes and rates of chemical reactions
•
Markers
can be described quantitatively.
• White board
-Efficiency of chemical reactions can be improved
by applying optimal conditions.
• handouts
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Student learning Goals
to understand how to calculate the rates of reaction
to be able to calculate the order of reactions
Prior Knowledge
Different types of reactions
Factors affecting rates of reaction
Basic calculations for rates and orders of reactions
Appendices
Appendix 1) Solving the mystery Phrase and
teacher notes
Ministry Expectations
D2.1 use appropriate terminology related to energy changes and rates of reaction, including, but not limited to: enthalpy,
activation energy, endothermic, exothermic, potential energy, and specific heat capacity [C]
D3.7 explain, with reference to a simple chemical reaction (e.g., combustion), how the rate of a reaction is determined by
the series of elementary steps that make up the overall reaction mechanism.
T/L Strategies
A)
Minds On
B)
Action
Assessment
-this activity encourages
students to work
collectively in a pair,
building upon each others
strengths.
-the activity have a slight
competitive nature to it,
encouraging the students
to complete the
calculations
-the activity allows for
regulation of their own
learning. Students can
check their answers on the
back of the sheet and if
the words do not make
sense then they know they
need to review/rework the
question.
-assessment as learning
-this could be used as
an assessment of
students’ current
understanding of how to
complete the
calculations.
-could also assess
student understanding
by using questioning
and collecting the
worksheet at the end of
class to review
students’ progress and
understanding
Note on calculating rates of
reaction
Activity 1:
Students will work in pairs to
complete the questions
relating to rates of reactions
and orders of reactions on the
answer scorecard. When
students have answered all
questions, they will come to
get the answer scorecard. The
students will then have to
find their answer on the back
of the scorecard in order to
obtain the mystery words.
Once all the words have been
gathered students must make
up the mystery sentence
relating to the unit.
Appendix 1) Solving the
mystery Phrase
C)
Consolidation
&
Connection
Next Steps
Rationale
Appendix 1
Teacher’s Notes
Calculating the Rates of Reactions Mystery Phrase
This activity can be given to students following a review note/discussion on how to calculate the
rates of reaction and the orders of a reaction. This activity is useful at motivating students to
complete the worksheet and it help them self-regulate their learning. Upon completing the word
puzzle, if the words students obtain are not fitting into a sentence with the other words, then they
know they must rework that particular problem.
Directions:
1. Students will work in pairs. Each pair will be provided with an “Answer Score Card” that
they must work the problems out and record them in the spaces provided.
2. Once students have completed all of the problems, the students will bring their sheet up
to the teacher for a brief review of any abundant/reoccurring mistakes.
3. Students will then receive the “Completing the Word Puzzle” sheet. This sheet has the
same questions on it with various answers to each problem
4. Students must select their answer from the list below each question.
5. Each answer has a word attached to it and the word for the students’ answer will be
written at the bottom under the “Found Words” section.
6. Once the students have found all the words, they must attempt to come up with the
mystery sentence.