2/10/09 10:52 AM Branch of chemistry that deals with calculating quantities of reactants and products in chemical reactions. Math with mole conversion factors H2 + I2 2HI Mass of H2 + mass of I2 mass of HI Theoretical yield = max amount of product that is possible from a given amount of reactants. Actual yield = amount of product actually obtained in a chemical reaction Less than or equal to theoretical yield Difficulty collecting the product Unexpected side reactions Environmental problems % yield = (actual)/(theoretical)x100 Chem 113 ? Stoichiometry & Limiting Reactiants 2/10/09 10:52 AM Limiting reactants ? Determines how much product is made because there is less of it than needed to completely react with the other reactants Question How many bikes could you build with 8 wheels, 5 frames, 6 handle bars, and 5 gears. 4 the wheels are the limiting reactant frames, handle bars, and gears are excess reactants. Used number of parts not the weight of the parts to determine Chem 113 ? Stoichiometry & Limiting Reactiants 2/10/09 10:52 AM
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