1. Stoichiometry http://www.unit5.org/chemistry/Stoichiometry.html

2. Guiding Questions How are dosages determined? How are toxins measured and controlled? Which is better: eating beans and rice at separate meals or together?

3. Table of Contents ‘Stoichiometry’ Balancing Chemical Equations Avogadro’s Number Molar Mass Combustion Reactions Synthesis Reactions Single Replacement Reactions Activity Series Double Replacement Reactions Mole Island Diagram Limiting Reactants Generic Stoichiometry Air Bag Design Water from a Camel Rocket Fuel Water in Space Excess Reactant Classes of Reactions

4. Stoichiometry You should understand  Moles, mass, representative particles (atoms, molecules, formula units), molar mass, and Avogadro’s number.  The percent composition of an element in a compound.  Balanced chemical equations: for example, for a given mass of a reactant, calculate the amount of produced.  Limiting reactants: calculate the amount of product formed when given the amounts of all the reactants present.  The percent yield of a reaction.  Reactions in solution: given the molarity and the volume of the reactants, calculate the amount of product produced or the amount of reactant required to react.  Molarity; preparation of solutions.

5. Lecture Outline – Stoichiometry Keys Lecture Outline – Stoichiometry Lecture Outline – Stoichiometry student notes outline textbook questions http://www.unit5.org/chemistry/Stoichiometry.html textbook questions text

6. Some common collections and the numbers of items in them. Timberlake, Chemistry 7 th Edition, page 179

7. Balancing Chemical Equations Coefficients

8. CH 4 + 2 O 2  CO 2 + 2 H 2 O Reactants Products 1 C atom 1 C atom 4 H atoms 4 H atoms 4 O atoms 4 O atoms Timberlake, Chemistry 7 th Edition, page 167

9. Reactants  Products Unbalanced Timberlake, Chemistry 7 th Edition, page 164

10. Cl H H H HH H H H 2 + Cl 2  HCl H 2 + Cl 2  2 HCl reactants products H Cl reactants products H Cl 2 2 22 2 2 1 1 (unbalanced) (balanced) Unbalanced and Balanced Equations

11. Meaning of Chemical Formula Chemical Symbol Meaning Composition H 2 O One molecule of water: Two H atoms and one O atom 2 H 2 O Two molecules of water: Four H atoms and two O atoms H 2 O 2 One molecule of hydrogen peroxide: Two H atoms and two O atoms