quantitative relaionships calculations

Lone Star Chemistry Solutions

A Dozen or More A Dozen or More CalculationsCalculationsQuantitative RelationshipsQuantitative Relationships

Mason, Koeck, and KulhanekMason, Koeck, and Kulhanek


BCCEBCCEAugust 1-5August 1-5

University of University of North TexasNorth Texas

Denton, TexasDenton, Texas


TEKS Development TEKS Development and Correlation to and Correlation to

CCRSCCRS

Lone Star Lone Star Chemistry Chemistry SolutionsSolutions

hhtps://callevents.unt.edu/ei/getdemo.ei?hhtps://callevents.unt.edu/ei/getdemo.ei?id3&s=_3000VYEX3id3&s=_3000VYEX3


Lone Star Lone Star Chemistry Chemistry SolutionsSolutionsThe best way to reach Texans is to tell them about The best way to reach Texans is to tell them about

Texas (and of course, align your talk with the 2010 Texas (and of course, align your talk with the 2010 TEKS).TEKS).

Alignment: TEKS (chemistry and algebra), Texas CCRS, NSESAlignment: TEKS (chemistry and algebra), Texas CCRS, NSES

Chemistry STAAR is looming!Chemistry STAAR is looming!

Theoretical Prospectus: Theoretical Prospectus: Most of chemistry requires higher-level thinking skills, but do Most of chemistry requires higher-level thinking skills, but do not sell your students short. If they are interested, they will not sell your students short. If they are interested, they will learn!learn!

Educational research indicates that high school lessons should Educational research indicates that high school lessons should be limited to 15-20 minutes and then there should be 5 minutes be limited to 15-20 minutes and then there should be 5 minutes of downtime (a change of focus) before beginning again—hence of downtime (a change of focus) before beginning again—hence the the Texas ConnectionsTexas Connections. .

5-E Model with spiral back emphasis (5-E Model with spiral back emphasis (Lessons LearnedLessons Learned))

Chemistry is built on change; be willing to change! Chemistry is built on change; be willing to change!


EngagementEngagement

Fire in the JugFire in the Jug

Hot ……………andHot ……………and

ColdCold


ExplorationExploration

Methane Farm – Methane Farm – Hockley CountyHockley County

Texas ConnectionTexas ConnectionMethaneMethane

MethanolMethanol

Combustion of MethanolCombustion of Methanol


ExplanationExplanation

Formulas and Formulas and Chemical EquationsChemical Equations

MethaneCH4

MethanolCH 3OH

Combustion of Methanol

2CH3OH + 3 O2 2CO2 + 4H2O


ElaborationElaboration

StoichiometryStoichiometryTTexas Connectionexas Connection

1. You have collected 64.0 grams of methanol 1. You have collected 64.0 grams of methanol from your conversion of methane gas. How from your conversion of methane gas. How many grams of water are produced from the many grams of water are produced from the complete combustion of the collected methanol?complete combustion of the collected methanol?

2. How many grams of carbon dioxide are produced 2. How many grams of carbon dioxide are produced from the combustion of 88.0 grams of propane (Cfrom the combustion of 88.0 grams of propane (C33HH88 ) ? ) ?


EvaluationEvaluation

Stoichiometry Stoichiometry Practical Limiting reactantsPractical Limiting reactants Texas ConnectionTexas Connection

What-a-burger What-a-burger

Corpus ChristiCorpus Christi

San Antonio - 2009San Antonio - 2009


EvaluationEvaluation

Stoichiometry Stoichiometry Practical Limiting reactantsPractical Limiting reactants Texas ConnectionTexas Connection

What is the “Equation “ for the Perfect What is the “Equation “ for the Perfect Hamburger?Hamburger?

How many “perfect hamburgers” can you How many “perfect hamburgers” can you make for the given ingredients?make for the given ingredients?


A Dozen or More A Dozen or More CalculationsCalculations

Additional Basic ConceptsAdditional Basic ConceptsStoichiometry, gas stoichiometry, limiting reactants, empirical and Stoichiometry, gas stoichiometry, limiting reactants, empirical and

molecular formulasmolecular formulas