1. Chemistry 1 – Notes #3b Chapter 12 Stoichiometry

2. 12.1 – What is stoichiometry? Vocabulary –stoichiometry – the study of the quantitative relationship between amounts of reactants used and products formed by a chemical equation (“how much” of the reactants make “how much” of the products?)

3. Iron+ Oxygen  Iron (III) oxide 4Fe+ 3O 2  2Fe 2 O 3 4 particles Fe + 3 particles O 2  2 particles Fe 2 O 3 4 moles Fe+ 3 moles O 2  2 moles Fe 2 O 3 223.4 g Fe+ 96.0 g O 2  319.4 g Fe 2 O 3 319.4g reactants  319.4 g products page 354

4. Practice Problems page 356

5. Vocabulary –mole ratio – a ratio between the numbers of moles of any two substances in a balanced chemical equations. Example: 2Al + 3Br 2  2AlBr 3

7. Practice Problems page 357

8. Chapter 12 Practice Problems in Notes Pg. 357

9. 12.2 Stoichiometric Calculations Use mole ratios to determine how much of a product will be produced (or how much of a reactant is required to produce a given amount of a product.) –mole-to-mole conversions (example 12-2) –mole-to-mass conversions (example 12-3) –mass-to-mass conversions (example 12-4)