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Chem Catalyst!

Chem Catalyst!. You are a scientist who has been asked to make 500g of aspirin. You have access to a state-of-the-art lab, all the reactants that you need, and plenty of money. What do you need to know to make sure that you do not waste supplies or end up with too little product?. Agenda:.

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Chem Catalyst!

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  1. Chem Catalyst! You are a scientist who has been asked to make 500g of aspirin. You have access to a state-of-the-art lab, all the reactants that you need, and plenty of money. What do you need to know to make sure that you do not waste supplies or end up with too little product?

  2. Agenda: • Do Now- Introduce stoichiometry • Introduce new chapter • Review balancing equations • Notes & Examples - using mole ratios • HW: p. 360 #11b, 12

  3. Chapter 12: Stoichiometry 12.1: The Arithmetic of Equations • What do balanced equations mean? 12.2: Chemical Calculations • Conversions using mole ratios and molar mass 12.3: Limiting Reagent and Percent Yield • Calculate limiting reagents and product formed • Calculate theoretical, actual, and percent yield

  4. Balancing Equations: Balance the following equations: 1) Cu + O2 --> CuO 2) N2 + H2 --> NH3

  5. Stoichiometry • Stoichiometry: The calculation of quantities in chemical reactions • Once you have a balanced chemical equation, the coefficients can be used to determine moleratios of products and reactants. • Mole ratios: relative amounts of moles of reactants and/or products in a chemical equation

  6. Example 1: N2 + 3H2 --> 2NH3 How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 0.60 mol N2 x 2 mol NH3 = 1 mol N2

  7. Example 2: 2Cu+ O2 --> 2CuO If you want to produce 9.50 mol of CuO, how many moles of Cu do you need? How many moles of O2?

  8. Mole Stoichiometry: Your turn! Cl2 + KBr -> KCl + Br2 You mix 2.5 mol of KBr into a beaker. How many mol of Cl2 are needed to react completely with it? How many mol of KCl will form? How many mol of Br2 will form?

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