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Stoichiometry

Stoichiometry. 11/12 Advanced Chemistry Ashley Elkins. Analyze Learners. Designed for students in the eleventh and twelfth grades Designed for an Advanced Chemistry course

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Stoichiometry

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  1. Stoichiometry 11/12 Advanced Chemistry Ashley Elkins

  2. Analyze Learners • Designed for students in the eleventh and twelfth grades • Designed for an Advanced Chemistry course • Previous skills taught include the following: significant figures, properties of matter, units of measurement, atomic weight, and naming ionic compounds

  3. State Objectives • AC.4.12 predict the products and write balanced equations for the general types of chemical reactions • AC.4.13 use dimensional analysis to perform unit conversions and to verify experimental calculations • AC.4.14 use the Avogadro constant to define the mole and to calculate molecular and molar mass as well as a molar volume • AC.4.15 perform calculations using the combined and ideal gas laws • AC.4.16 use molar mass to calculate the molarity of solutions, percentage composition, empirical formulas and formulas of hydrates

  4. Select Media and Materials • Scientific Calculators • Computers • Paper • Pencils • Text Book • Selected Websites

  5. Selected Websites • Balancing Chemical Equations: http://www.mansfieldct.org/schools/mms/staff/hand/chembalance.htm • Chemistry Achievement Web Sites: http://www.jburroughs.org/science/mharris/websites.html • Chemistry Experiment Simulations and Conceptual Computer Animations: http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/simDownload/index4.html • SASinSchool: http://sasinschool.com

  6. Utilize Media and Materials This lesson plan is designed for seven days.

  7. Day One • Review of previously taught material • Introduce students to stoichiometry • Define and explain products, reactants, and chemical ratios • Briefly explain balancing chemical equations

  8. Day Two • Review what reactants and products are • Lecture on how chemical equations are balanced • Use “Balancing Chemical Equations” website to demonstrate how an equation is properly balanced • A worksheet will also be assigned for student practice.

  9. Day Three • Introduce students to Avogadro’s number • Explain and demonstrate unit conversions • A worksheet from the “Chemistry Achievement Web Sites” site will be used for students to practice converting units of measurement using the mole.

  10. Day Four • Introduce molarity as a part of stoichiometry • Break students up into groups to work on converting moles to different units of measurement and determining the molarity of those substances • Time permitting, a short game designed after Who Wants to be a Millionaire will be administered to evaluate students on stoichiometry concepts, such as products and the mole, that have already been covered.

  11. Day Five • Introduced students to the difference between molecular and empirical formulas. • The simulation on the “Chemistry Experiment Simulations and Conceptual Computer Animations” website will be used to demonstrate the difference between the two types of formulas. • Percent composition will be introduced with an explanation of how to determine it. • The “SAS in Schools” website will then be used; the “web lesson” will be assigned to students to help them grasp the concept of empirical and molecular formulas.

  12. Day Six • Introduce students to the Ideal Gas Law • Explain Boyle’s Law, Charles’s Law, and Avogadro’s Law • Use simulations from the “Chemistry Experiment Simulations and Conceptual Computer Animations” to demonstrate what each of these laws mean • Introduce the equation PV=nRT

  13. Day SevenAssessement • Students will be assessed on their understanding of stoichiometry. This assessment will be an extended version of The Weakest Link. The students will break up into groups and answer questions one group after the other. The questions will get harder for each amount of “money,” or points in this case, that students can earn. All students will receive points for participation and the points earned by playing the game will be used as extra credit on a formal exam.

  14. Require Learner Participation • Student interest will be kept in this unit by mixing computer simulations in with lecture time. • Allow students to work in groups • The Who Wants to be a Millionaire and The Weakest Link games will help keep student interest.

  15. Evaluate and Revise • Students will be evaluated through the games Who wants to be a Millionare and The Weakest Link. Worksheets assigned will also allow progress to be tracked.

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