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Learning Interchange
Units of Practice

Lesson #1: Mole Ratio

Lesson Details


Subject: Science
Learning Level: High School
Author(s): Geri Anderson-Saxton and Melissa Chardeen
Submitted by:

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:

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