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. H. H. N. H. H. Cl. Cl. Cl. C. Cl. Low Budget Manipulatives to Improve Teaching Stoichiometry. A man was out walking in the desert when a voice said to him, "Pick up some pebbles and put them in your pocket, and tomorrow you will be both happy and sad."
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Low Budget Manipulatives
to
Improve Teaching
Stoichiometry
A man was out walking in the desert when a voice said to him, "Pick up some pebbles and put them in your pocket, and tomorrow you will be both happy and sad."
The man obeyed. He stooped down and picked up a handful of pebbles and put them in his pocket. The next morning he reached into his pocket and found diamonds, sapphires, rubies and emeralds.
And he was both happy and sad.
Happy he had taken some  sad that he hadn't taken more.
Anthony Fernandes
La Salle High School (Pasadena)
25 Years Education
Biology, Chemistry (All Levels), Genetics
Certified in Biotechnology
afernandes@lasallehs.org
626.696.4337
B
A
Brian Miller
La Salle High School (Pasadena)
29 Years Education
Biology, Chemistry (All Levels), Environmental Science,
Anatomy, Physics
Smart Notebook Trainer
smarterteacher.blogspot.com
bmiller@lasallehs.org
626.696.4349
Name email School City
B
Housekeeping
Sign In Sheet
Cell Phones
Bathroom Breaks
Ask Questions
A
Difficulties in Teaching Stoichiometry
Resistance
Math
Conversions
Fractions
Nomenclature
Reading the Problem
HOW TO SOLVE A PROBLEM
Step I. Understand the Problem
(Put Your Pencil Down)
Collect Relevant Data
Read the Question
What You Have (Knowns)
What You Want (Unknowns)
Step II. Choose an Appropriate Strategy
Act It Out
Choose an Operation
Draw a Picture
Guess and Check
Look for a Pattern
Make a Chart or Table
Make an Organized List
Use Logical Reasoning
Work Backwards
Rafe Esquith
Teach Like Your Hair is On Fire
Step III. Solve The Problem
(Pick Up Your Pencil)
Step IV. Analyze Your Result
Does My Answer Make Sense?
Our Classroom
The 3 C's: Critical Thinking,
Communication, Collaboration
White Boards
Home Depot
Size & Space
Presentation
Encourages Collaboration
Creates Focus
Manipulatives
Printer Overstocks
B
A
Pre  Stoichiometry
Periodic Table
Know Your Ions
Memorize or Not to Memorize
Ion Cards
The Mole Triangle
Stoichiometry
PreSupposes Balancing Equations,
Chemical Reactions and Calculating Molar Mass
Introducing Stoichiometry
Utilize One Basic Balanced Equation
Ammonia N2 + 3H2 > 2NH3
Rust4Fe + 3O2 > 2Fe2O3
Simple Equation
Varied Coefficients
Work all Aspects
B
Synthesis
A + B AB
Decomposition
AB A + B
Single Replacement
AB + CD AD + B
Double Replacement
AB + CD AD + CB
Fe2O3
4
Fe
+
3
O2
2
N2
+
3
H2
2
NH3
Fe2O3
4
Fe
+
3
O2
2
What is the mole ratio for each of the following:
Fe : O2
Fe : Fe2O3
O2 : Fe2O3
A
Fe2O3
4
Fe
+
3
O2
2
How many grams of rust (Fe2O3) can be produced from the complete corrosion of 15 grams of iron?
Step 1:
Read the Question and Confirm
Equation is Balanced
Step 2:
Highlight Start (have) in Green and
Stop in Red (want).
Fe2O3
4
Fe
+
3
O2
2
B
How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?
15 g Fe
? g Fe2O3
Step 3:
Use Stoichiometry Pieces to Create Roadmap
Fe2O3
4
Fe
+
3
O2
2
moles of
want
g.f.m. of
given
g.f.m. of
want
__moles
of given
grams of
want
moles of
given
__ grams of
given
1 mole
of given
1 mole of
want
How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?
? g Fe2O3
15 g Fe
grams of
given
grams of
want
1 mole
of given
moles of
want
g.f.m. of
want
g.f.m. of
given
moles of
given
1 mole of
want
GRAMS
MOLES
MOLES
GRAMS
moles of want
from balanced
equation
gram formula mass
of want
1 mole of given
grams of want
grams of
given
x
x
x
=
gram formula mass
of given
moles of given
from balanced
equation
1 mole of want
Fe2O3
4
Fe
+
3
O2
2
A
How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?
15 g Fe
? g Fe2O3
Step 4:
Solve Problem Using White Boards
Step 5:
Compare, Correct and/or Present Work on White Boards.
B
It is absolutely FREE!!!
N2
+
3
H2
2
NH3
A
How many grams Hydrogen are necessary to produce 0.75 moles of ammonia (NH3)?
grams of
given
grams of
want
1 mole
of given
moles of
want
g.f.m. of
want
g.f.m. of
given
moles of
given
1 mole of
want
GRAMS
MOLES
MOLES
GRAMS
moles of want
from balanced
equation
gram formula mass
of want
1 mole of given
grams of want
grams of
given
x
x
x
=
gram formula mass
of given
moles of given
from balanced
equation
1 mole of want
N2
+
3
H2
2
NH3
1 mole of
want
grams of
want
__ grams of
given
moles of
want
1 mole
of given
moles of
given
g.f.m. of
given
__moles
of given
g.f.m. of
want
N2
+
3
H2
2
NH3
How many moles of Hydrogen are necessary to produce 2.5 grams of ammonia (NH3)?
B
grams of
given
grams of
want
1 mole
of given
moles of
want
g.f.m. of
want
g.f.m. of
given
moles of
given
1 mole of
want
GRAMS
MOLES
MOLES
GRAMS
moles of want
from balanced
equation
gram formula mass
of want
1 mole of given
grams of want
grams of
given
x
x
x
=
gram formula mass
of given
moles of given
from balanced
equation
1 mole of want
N2
+
g.f.m. of
want
1 mole
of given
__ grams of
given
3
H2
2
NH3
__moles
of given
1 mole of
want
moles of
given
grams of
want
moles of
want
g.f.m. of
given
Your
Turn
Fe2O3
4
Fe
+
3
O2
2
What volume of oxygen is necessary to produce 1.5 grams of rust when an excess of iron is present?
Suggestions
Student Created Problems
What do you suggest???
WPAs
Professional Development Workshops
by SMARTERTEACHER
SMART Boards and SMART Notebook in the Classroom
SMART Response in the Classroom
Effective Teaching Strategies for the Block Schedule
Teaching the Three C's:
Critical Thinking, Communication and Collaboration
Multiple Intelligences in the Science Classroom
Teaching to Both Sides of the Brain
smarterteacher@gmail.com
smarterteacher.blogspot.com
Attachments
Stoichiometry Moles to Grams.wmv
Stoichiometry Grams to Grams.wmv