low budget manipulatives to improve teaching stoichiometry

Low Budget Manipulatives

toImprove Teaching

StoichiometryC

Cl

Cl

Cl

Cl

N

H

H

H

H

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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 FernandesLa Salle High School

(Pasadena)25 Years Education

Biology, Chemistry (All Levels), Genetics

Certified in Biotechnology

afernandes@lasallehs.org

626.696.4337

B

Brian MillerLa Salle High School

(Pasadena)29 Years Education

Biology, Chemistry (All Levels), Environmental Science,

Anatomy, PhysicsSmart Notebook Trainer

smarterteacher.blogspot.combmiller@lasallehs.org

626.696.4349

A

Housekeeping

Sign In Sheet

Cell Phones

Bathroom Breaks

Ask Questions

Name email

School

City

B

Difficulties in Teaching Stoichiometry

Resistance

MathConversionsFractions

Nomenclature

Reading the Problem

A

HOW TO SOLVE A PROBLEM

Step I. Understand the Problem(Put Your Pencil Down)

Collect Relevant DataRead the Question

What You Have (Knowns)What You Want (Unknowns)

Step II. Choose an Appropriate StrategyAct It Out

Choose an OperationDraw a Picture

Guess and CheckLook for a Pattern

Make a Chart or TableMake an Organized ListUse Logical Reasoning

Work Backwards

Step III. Solve The Problem(Pick Up Your Pencil)

Step IV. Analyze Your ResultDoes My Answer Make Sense?

Rafe

Esq

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hTeach

Lik

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ou

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air

is O

n F

ire

Our Classroom

The 3 C's: Critical Thinking,

Communication, Collaboration

White BoardsHome DepotSize & SpacePresentationEncourages CollaborationCreates Focus

ManipulativesPrinter Overstocks

B

Pre - Stoichiometry

Periodic Table

Know Your Ions Memorize or Not to

MemorizeIon Cards

The Mole Triangle

A

Stoichiometry

Pre-Supposes Balancing Equations,

Chemical Reactions and Calculating Molar Mass

Introducing StoichiometryUtilize One Basic Balanced

EquationAmmonia N2 + 3H2 ---> 2NH3

Rust 4Fe + 3O2 ---> 2Fe2O3

Simple EquationVaried CoefficientsWork all Aspects

B

Synthesis

Decomposition

AB A + B

A + B AB

Double Replacement

AB + CD AD + CB

Single Replacement

AB + CD AD + B

N2 H2+ NH3

3 2

Fe O2+ 3 24 Fe2O3

What is the mole ratio for each of the following:

Fe : O2

Fe : Fe2O3

O2 : Fe2O3

Fe O2+ 3 24 Fe2O3

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).

A

Fe O2+ 3 24 Fe2O3

How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?

Step 3: Use Stoichiometry Pieces to Create Roadmap

15 g Fe? g Fe2O3

B

Fe O2+ 3 24 Fe2O3

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

__ grams ofgiven

__molesof given

How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?

15 g Fe? g Fe2O3

Fe O2+ 3 24 Fe2O3

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

grams ofgiven

GRAMS GRAMSMOLES MOLES

grams of given

1 mole of given

gram formula massof given

1 mole of want

gram formula massof want

moles of wantfrom balanced

equation

moles of givenfrom balanced

equation

x x x =grams of

want

How many grams of rust (Fe2O3) can be produced from the complete oxidation of 15 grams of iron?

Step 4: Solve Problem Using White Boards

15 g Fe? g Fe2O3

A

Step 5: Compare, Correct and/or Present Work on White Boards.

Fe O2+ 3 24 Fe2O3

B

It is absolutely FREE!!!

How many grams Hydrogen are necessary to produce 0.75 moles of ammonia (NH3)?

A

N2 H2+ NH3

3 2

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

grams ofgiven

GRAMS GRAMSMOLES MOLES

grams of given

1 mole of given

gram formula massof given

1 mole of want

gram formula massof want

moles of wantfrom balanced

equation

moles of givenfrom balanced

equation

x x x =grams of

want

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

__ grams ofgiven

__molesof given

N2 H2+ NH3

3 2

How many moles of Hydrogen are necessary to produce 2.5 grams of ammonia (NH3)?

B

N2 H2+ NH3

3 2

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

grams ofgiven

GRAMS GRAMSMOLES MOLES

grams of given

1 mole of given

gram formula massof given

1 mole of want

gram formula massof want

moles of wantfrom balanced

equation

moles of givenfrom balanced

equation

x x x =grams of

want

1 mole of given

moles ofwant

g.f.m. ofwant

g.f.m. ofgiven

moles of given

1 mole of want

grams ofwant

__ grams ofgiven

__molesof given

N2 H2+ NH3

3 2

Your

Turn

What volume of oxygen is necessary to produce 1.5 grams of rust when an excess of iron is present?

Fe O2+ 3 24 Fe2O3

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