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Limiting Factors and Percent Yield

Limiting Factors and Percent Yield. Hot Dogs in the News. Takeru Kobayashi of Japan downed 44½ hot dogs in 12 minutes. One hot dog = one hot dog + one bun. WHAT IF….

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Limiting Factors and Percent Yield

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  1. Limiting Factors and Percent Yield

  2. Hot Dogs in the News Takeru Kobayashi of Japan downed 44½ hot dogs in 12 minutes. One hot dog = one hot dog + one bun. WHAT IF… Mr. Kobayashi didn’t do his math correctly. He bought 5 packs of hot dogs (10 per package) and 5 packs of hot dog buns (8 per package). How many hot dogs (according to the official formula) could he have eaten? Source: CNN.com

  3. Hot Dogs in the News One hot dog = one hot dog + one bun. WHAT IF… Mr. Kobayashi didn’t do his math correctly. He bought 5 packs of hot dogs (10 per package) and 5 packs of hot dog buns (8 per package). How many hot dogs (according to the official formula) could he have eaten? Excess 5 hot dog packs 10 hot dogs 50 hot dogs x = 1 hot dog pack Limiting Factor 40 possible hot dogs 5 bun packs 8 buns 40 buns x = 1 bun pack Source: CNN.com

  4. Practice Problems 1. 3 CuSO4 + 2 Al Al2(SO4)3 + 3 Cu How many grams of copper will be produced if 20.0 g of each reactant is used? What is the limiting reactant? 3 mol Cu 1 mol CuSO4 63.55 g Cu 20.0 g CuSO4 = x x x 1 mol Cu 159.61 g CuSO4 3 mol CuSO4 7.96 g Cu 1 mol Al 63.55 g Cu 3 mol Cu 20.0 g Al x x x = 70.7 g Cu 1 mol Cu 2 mol Al 26.98 g Al 7.96 g Cu can be produced. CuSO4 is the limiting reactant.

  5. On Perfection “Perfection never exists in reality, but only in our dreams.” - Dr. Rudolf Dreikurs “Perfection is our goal, excellence will be tolerated.” - J. Yahl

  6. Get Real! Johnny took a quiz yesterday. He missed 4 questions and earned 63 points out of 70. • Was he perfect? • What was his possible score? • What was his actual percent score? 70 points = 100 % 90 %

  7. Get Real! Mrs. Duffin ran a reaction in her lab yesterday. She predicted that 183 grams of product would be formed. The reaction only yielded 162 grams of product. But she looked really cool in her lab coat. • Was her reaction perfect? • What was the percent yield? 162 grams 100 88.5 % x = 183 grams

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