Lesson Details

Day 115: Limiting Reactant and Percent Yield

2015-2016

Chemistry

Date

Feb. 16, 2016

Additional Info

  1. Warm Up: See below
  2. Quiz: 6 problems, 1, 2 and 3 step stoichiometry
  3. Nearpod/Worksheet: View nearpod, answer questions/activities within nearpod and fill out worksheet #7 (DUE TOMORROW) Nearpod submission  due tomorrow  (ONLY GRADING NEARPOD)


Warm Up: Identify the limiting reactant if 5.43 moles of Na reacts with 4.25 moles of O2 in the following equation.

Answer:

One of the simplest ways to identify a limiting reactant is to compare how much product each reactant will produce. Stoichiometry will be used to create a ratio between reactants and products given in the balanced chemical equation.

(5.43 moles of Na will produce 2.72 moles Na2O)

(4.25 moles of O2 will produce 8.50 moles Na2O)

In the reaction Na will produce a lesser amount of Na2O than O2 will therefore Na is the limiting reactant. Notice that the starting amount of Na is actually larger than the starting amount of O2 but stoichiometry shows that Na will run out first.

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