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Chemistry

Chemistry. Ch 12 Stoichiometry Notes #1. What is stoichiometry ?. Study of quantitative relationships btwn amounts of reactants used and products formed by a chemical reaction Based on the law of conservation of mass

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Chemistry

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  1. Chemistry Ch 12 Stoichiometry Notes #1

  2. What is stoichiometry? • Study of quantitative relationships btwn amounts of reactants used and products formed by a chemical reaction • Based on the law of conservation of mass • Chapter 11 math is the basis of the chapter 12 math – if you don’t get it – ask!

  3. Interpreting equations • 4Fe (s) + 3O2 (g) -> 2Fe2O3 (s) • Particles • Moles • Mass

  4. Example - interpreting • N2 (g) + 3H2 (g) -> 2NH3 (g) • Particles • Moles • Mass

  5. Homework • Interpreting • 6-14 on side 1 of sg • Number 1 on the supplemental • That much should be DONE for tomorrow!

  6. Mole Ratios • Ratio between the numbers of moles of any 2 substances in a balanced chemical equation • We will be using mole ratios as conversions factors in future math problems • Mole ratios show relationships between reactants and products in equations

  7. Example – Mole Ratio • 2Al (s) + 3Br2 (l) -> 2AlBr3 (s) • How many will there be? • Number of species x 1 less • Species = reactants and products

  8. Example – Mole Ratio • What is the mole ratio with the biggest value? • What is the mole ratio relating Al to Br? • What is the mole ratio relating the product to Al? • HW – back of SG and #2 on supp

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