Quantitative Relaionships Calculations


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Quantitative Relationships Calculations presented by Diana Mason, Deborah Koeck and Joyce Kulhanek, ACT2 2010
The Texas Education Agency has issued and implemented major revisions to the chemistry TEKS. Chemistry is usually the first course students take that requires them to understand how to solve problem that can't just simply be memorized. Even though these new standards have been aligned with algebra I, the actual use of this knowledge is in the middle to higher levels of Bloom's Taxonomy (application, analysis and synthesis). There is also a new emphasis on mathematics that will be incorporated into the Chemistry STAAR exams. This workshop will take 12 (or more) calculations from the revised TEKS that are also documented in the Texas College and Career Readiness Standards and will share teaching suggestions and activities supporting stoichiometry and molarity.

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Quantitative Relaionships Calculations

  1. 1. A Dozen or More Calculations Quantitative Relationships Mason, Koeck, and Kulhanek
  2. 2. BCCE August 1-5 University of North Texas Denton, Texas
  3. 3. TEKS Development and Correlation to CCRS Lone Star Chemistry Solutions hhtps://callevents.unt.edu/ei/getdemo.ei?id3&s=_3000VYEX3
  4. 4. Lone Star Chemistry Solutions <ul><li>The best way to reach Texans is to tell them about Texas (and of course, align your talk with the 2010 TEKS). </li></ul><ul><ul><li>Alignment: TEKS (chemistry and algebra), Texas CCRS, NSES </li></ul></ul><ul><li>Chemistry STAAR is looming! </li></ul><ul><li>Theoretical Prospectus: </li></ul><ul><ul><li>Most of chemistry requires higher-level thinking skills, but do not sell your students short. If they are interested, they will learn! </li></ul></ul><ul><ul><li>Educational research indicates that high school lessons should be limited to 15-20 minutes and then there should be 5 minutes of downtime (a change of focus) before beginning again—hence the Texas Connections . </li></ul></ul><ul><ul><li>5-E Model with spiral back emphasis ( Lessons Learned ) </li></ul></ul><ul><li>Chemistry is built on change; be willing to change! </li></ul>
  5. 5. Engagement Fire in the Jug <ul><li>Hot ……………and </li></ul><ul><li>Cold </li></ul>
  6. 6. Exploration Methane Farm – Hockley County Texas Connection <ul><li>Methane </li></ul><ul><li>Methanol </li></ul><ul><li>Combustion of Methanol </li></ul>
  7. 7. Explanation Formulas and Chemical Equations Methane CH 4 Methanol CH 3 OH Combustion of Methanol 2CH 3 OH + 3 O 2  2CO 2 + 4H 2 O
  8. 8. Elaboration Stoichiometry T exas Connection <ul><li>1. You have collected 64.0 grams of methanol from your conversion of methane gas. How many grams of water are produced from the complete combustion of the collected methanol? </li></ul><ul><li>2. How many grams of carbon dioxide are produced from the combustion of 88.0 grams of propane (C 3 H 8 ) ? </li></ul>
  9. 9. Evaluation Stoichiometry Practical Limiting reactants Texas Connection <ul><li>What-a-burger </li></ul><ul><li>Corpus Christi </li></ul><ul><li>San Antonio - 2009 </li></ul>
  10. 10. Evaluation Stoichiometry Practical Limiting reactants Texas Connection <ul><li>What is the “Equation “ for the Perfect Hamburger? </li></ul><ul><li>How many “perfect hamburgers” can you make for the given ingredients? </li></ul>
  11. 11. A Dozen or More Calculations Additional Basic Concepts Stoichiometry, gas stoichiometry, limiting reactants, empirical and molecular formulas