Central Bucks East High School
Date: Monday, April 17, 2006
Blocks: 1 and 4
Class: 11th grade Academic Chemistry
Standard(s): 3.4.10 Explain concepts about the structure and properties of matter.
-3.4.10A1: Know that atoms are composed of even smaller sub-atomic structures whose
properties are measurable.
- 3.4.10A6: Recognize formulas for simple inorganic compounds.
Unit: Stoichiometry
Objective: Students will interpret balanced chemical equations in terms of interacting
moles, representative particles, masses and gas at STP. Students will construct mole
ratios from balanced chemical equations and apply these ratios in mole-mole
stoichiometric calculations.
Materials to be used: overhead, chalkboard
Instructional Procedures:
- PCA: Students will answer questions then partner with the person sitting next to
them and discuss.
o T-P-S: 2 questions on the overhead (1. What is the importance of
balancing equations? 2. What do the coefficients tell us?)
o Discuss as a class. (8 min)
- Put words on overhead. Students will use prior knowledge and deduction skills to
pair up the words with the clues on the word search. (15 min)
- Teacher lecture on overhead: Introduction to chapter 8- Stoichiometry (15 min)
- Students will practice writing mole ratios. If more practice is needed, put
equations on the board.
- Real-life connection recipe. Use a chocolate chip cookie recipe as an analogy
for chemical equations. (10 min)
o Ex: 1 bag CC + 2 eggs + 1 cup flour+ 3 cups sugar 1 batch cookies
o How much ingredients would you need for 2 batches? 3 batches?
o If you wanted to make 4.5 batches, how many eggs would you need?
o Compare to stoichiometic calculations.
- Teacher-led problems on board. (20 min)
o N2 + 3H2 2NH3
o If 2 moles of Nitrogen react, how many moles of ammonia will be
produced?
