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Percent Yield

Percent Yield. Objectives: 6.0 Solve stoichiometric problems involving relationships among the number of particles, moles, and masses of reactants and products in a chemical reaction 6.3 Identifying the nomenclature of ionic compounds, binary compounds, and acids. Batting Averages.

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Percent Yield

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  1. Percent Yield Objectives: 6.0 Solve stoichiometric problems involving relationships among the number of particles, moles, and masses of reactants and products in a chemical reaction 6.3 Identifying the nomenclature of ionic compounds, binary compounds, and acids

  2. Batting Averages • If a softball player has 23 hits after 90 times at bat, how would you determine the efficiency of her batting? • What is the efficiency of her batting? • What is her batting average? • How do you think the efficiency of a chemical reaction might be measured?

  3. Think Back to the Lab • Did any of you reheat your reactants until your masses were within 0.01 grams of each other? • If not, your reaction didn’t go to completion --- simply due to time restraints. • However, many reactions stop before all the reactants are used up.

  4. Theoretical Yield • You know how to calculate how much product you SHOULD get , right? • This is called theoretical yield: the maximum amount of product that can be produced from a given amount of reactant • What do you think actual yield is, and how would you determine it? Answer: the actual amount of product produced in an experiment; measure the mass of the product!

  5. Percent Yield • Def: the ratio of actual yield to theoretical yield. % yield = actual yield (experimental) x100 theoretical yield (calculated)

  6. Example Problems & Assignment • Example: Practice Problem #27 (p.372) • Also refer to Example Problem in book on p. 371. • Assignment: Practice Problems 28-29 (p.372) and #34 (p.373)

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