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Problem-Based Learning in stoichiometry

Problem-Based Learning in stoichiometry. Friday Grand Salon – Marriott 10:00 – 10:50. Presenters : Sarah Eales, Kevin Cameron, and Christine Wahl Materials available @ http://chemistrycameron.wikispaces.com/ Gwinnett County Public Schools Peachtree Ridge High School. GPS Addressed.

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Problem-Based Learning in stoichiometry

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  1. Problem-Based Learning in stoichiometry Friday Grand Salon – Marriott 10:00 – 10:50 Presenters: Sarah Eales, Kevin Cameron, and Christine Wahl Materials available @ http://chemistrycameron.wikispaces.com/ Gwinnett County Public Schools Peachtree Ridge High School

  2. GPS Addressed • SC2 Students will relate how the Law of Conservation of Matter is used to determine chemical composition in compounds and chemical reactions. • c. Apply concepts of the mole and Avogadro’s number to conceptualize and calculate • Empirical/molecular formulas, • Mass, moles and molecules relationships, • Molar volumes of gases.

  3. Classroom Structure • This PBL can be utilized in an on level chemistry class as well as an honors/gifted setting. • PRHS is on a 90 minute block (4 blocks daily) in which we see our students everyday.

  4. Rocket Launching into a PBL • Prior to this activity, the students are involved in an investigational activity which allows them to hypothesize about the appropriate ratio needed to create rocket fuel using zinc and sulfur. • This project piggy backs off of that demonstration providing real world application to a very complex concept. • http://www.periodicvideos.com/videos/mv_zinc_and_sulfur.htm

  5. Partners create a team name

  6. Each student gets a time card

  7. Day 1 - Molar mass

  8. Day 1 - Molar mass

  9. Day 1 - Molar mass

  10. Day 2 – Percent Composition

  11. Day 2 – Percent Composition

  12. Day 3 – Empirical and Molecular Formula

  13. Day 3 – Empirical and Molecular Formula • Procedures: • 1. For each of the 5 sugar samples, perform the following steps: • a. Mass each of the three elements and record in data table. • b. Showing all work, perform calculations to determine empirical formula. • c. Showing all work, perform calculations to determine molecular formula. • 2. For the unknown, perform the following steps: • a. Mass each of the three elements and record in data table. • b. Showing all work, perform calculations to determine empirical formula. • c. Determine if the unknown matches any of the known sugar samples.

  14. Day 3 – Empirical and Molecular Formula YOUR TURN!

  15. Day 4 – Report The Strange Case of Mendeleev Mechanics Rocket Shop Vandalism: Case # 1023 You and Your PRCSI team are called to the scene of a recent vandalism at the Mendeleev Mechanics Rocket Shop. The equipment shows signs of human interference. The one unknown compound found at the scene is C6H15O6. The suspects were found in and around the crime scene and must be identified by the substances found in their belongings or in their persons. Interviews are not available so it is up to you to identify the suspects based on this evidence and the employee database (Sugary drink lab). You must submit your report to your executive director explaining how each suspect was identified. Include a data table showing the suspects, their names, and the formulas and names of the compounds used identify them. As always, the director will want to see all of your work. Based on this data, it is up to you to determine which suspect is responsible for the vandalism and explain their motive.

  16. Day 4 – Report Suspect with sugar # Analysis of compound 1 Na=27.38 H=1.19 C=14.29 O=57.14 2 C= 44.44 H=6.17 O=49.38 3 C=40.00 H=6.67 O=53.33 Molecular Mass= 180g/mol 4 Ca= 40.00 C= 12.00 O=48.00 5 C=57.14 H=6.16 N=9.52 O=27.18 6 C=63.56 H=6.00 N=9.27 O=21.17 The following is a list of the possible compounds: Aspartame C14H18N2O5artificial sweetener Flour C6H10O5 used in baking cakes Acetaminophen C8H9NO2pain killer Glucose C6H12O6 ingredient in chocolate Baking Soda NaHCO3 used in making breads Calcium Carbonate CaCO3used in antacids

  17. Day 4 – Report Here is the suspect list: Christine Chemrules- chemist addicted to sugar-free drinks Sarah Sugar- manager that eats chocolate for breakfast, lunch, and dinner Kasey Kumar- Astronaut and internationally recognized baker Cameron Cakes- Chef who is famous for his designer cupcakes Mechanic Matthews- world renowned mechanic with a shoulder injury K Tashlein- builder of schools (a very stressful job)

  18. Day 4 – Report • The Strange Case of Mendeleev Mechanics Rocket Shop Vandalism: Case # 1023 Report • Once all investigative work is finished, you will need to complete a report to be submitted to the courts. The report needs to include the following: • An overview of the process in which you identified all of the victims. (How you determined the substances using empirical formula) • Identification of the passenger responsible for the crash. (This is where you make up a motive supported by your evidence) • A picture that will help explain the story. • This report should contain at least two paragraphs as well as a colorful picture representing the story. All of this needs to be presented neatly on one or two sheets of paper. • Your report must be submitted by ____________________or the suspect goes free!

  19. PowerPoint Presentation www.chemistrycameron.wikispaces.com

  20. Session Evaluation: Friday http://tinyurl.com/GSTA27

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