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Chap 12

Chap 12 . Stoichiometry . Do Now Balance C 2 H 5 OH + O 2 → CO 2 + H 2 O Objective – Introduction to Stoichiometry HW – Pg. 358 # 9, 10 . Mole Ratios . 2H 2 + O 2 → 2H 2 O. Atoms . 2H 2 + O 2 → 2H 2 O. Atoms

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Chap 12

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  1. Chap 12 Stoichiometry

  2. Do Now Balance C2H5OH + O2→ CO2 + H2O • Objective – Introduction to Stoichiometry • HW – Pg. 358 # 9, 10

  3. Mole Ratios

  4. 2H2 + O2 → 2H2O Atoms

  5. 2H2 + O2 → 2H2O Atoms 4 atoms H added to 2 atoms O yield 4 atoms H and 2 atoms

  6. 2H2 + O2 → 2H2O Atoms 4 atoms H added to 2 atoms O yield 4 atoms H and 2 atoms Molecules 2 molecules H added to 1 molecule O yield 2 molecules H2O

  7. 2H2 + O2 → 2H2O Moles 2 mol Hydrogen added to 1 mol Oxygen yield 2 mol Water

  8. 2H2 + O2 → 2H2O Moles 2 mol H added to 1 mol O yield 2 mol H20 Mass

  9. 2H2 + O2 → 2H2O Volume

  10. 12.3 Limiting Reagent and Percent Yield Do Now Can you start a fire with water? Objective Limiting Reagent and Percent Yield Homework Pg. 370 # 25,26

  11. Liming Reagent Limiting Reagent – The reagent you run out of Excess Reagent – The reagent you do not run out of

  12. How to Determine Limiting Reagent Cu + S → Cu2S What is missing?

  13. How to Determine Limiting Reagent 2Cu + S → Cu2S all equations must be balanced in stoichiometry What is the main unit of measurement used in stoichiometry?

  14. 2Cu + S → Cu2S What is the limiting reagent when 80.0 g Cu reacts with 25.0g S? • Convert to Moles • Pick a reactant and use all of it. Do you have enough of the other?

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