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Abstract
Students begin to understand how stoichiometry answers the
question: "How much". To begin answering this question, students
need to understand the mole ratio.
Lesson fundamental understandings:
Essential
Questions: How can one use the balanced equation (the
recipe) to determine the amount of reactants needed to produce the
desired amount of product?
Standards
National Standards Mathematics is
essential in scientific inquiry. Mathematical tools and models guide
and improve the posing of questions, gathering data, constructing
explanations, and communicating results.
State Standards Nevada: 20.12.1 Use
mathematical symbols and formulas to express relationships that
behave in the same ways as the objects or processes under
investigation
Lesson
Prerequisite Skills
Students need to know how to write a formula and balance an
equation.
Teacher
Information/Situations/Setting/Time Time frame: Two
Days (45 minute periods)
Materials Needed: Lab equipment such as
: Balances, Bunsen Burner, evaporating dish, watch glass, solid
sodium carbonate, 3 molar hydrocholric acid, safety goggles
Five
pennies, one nickel, scale, for mole ratio demonstration
Homework
Worksheets containing problems with mole- mole ratios
Pre-lesson:
Instructor needs to set up lab
NOTE: If you wish to shorten
this to one (55 min) day, you could a) omit the Exploration Lab or
b) Do the exploration lab as a demo with discussion and
guided/indepdendent practice afterward
Assessment
Independant practice with mole-mole practice problems with group
feedback and instrutor feedback.
Independent practice as homework
assignment
Lab report with the exploration lab
Student Activity/Tasks 1) Introduction
to mole ratio using five pennies and one nickel to observe mass
ratio vs. value ratio: Have one student mass 5 pennies;
another
student mass 1 nickel
Students will discuss how this relates to
mole ratio and mass ratio
2) Teacher should discuss and guide
practice with mole rtatio
3) Students will perform mole - mole
problems for independent practice
4) Students will do an
exploration lab for mole ratio (for example "Totally up Front" from
CRYSTAL)
Enrichment/Alternate Activity:
Instructor may do additional labs and / or practice problems
Cross-Curricular:
Algerbra - setup stiochiometry equations ratios
Technology
Requirements/Tools/Materials
Possible technologies:
Overhead projector for guided
practice
Acknowledgements:
Exploration lab came from: CRISTAL Program, Iowa Chemistry Task
Force, University of Northern Iowa, Price Laboratory School; Dr.
Jody Stone, Project Director
Additional Resources
Main
URL:
Related Lessons
Related Resources
Copyright © 1997-2003
Career Connection to Teaching with Technology
USDOE Technology Innovation Challenge Grant
Marshall Ransom, Project Manager
All rights reserved.
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