grilled cheese sandwich
DESCRIPTION
Grilled Cheese Sandwich. Bread + Cheese ‘Cheese Melt’. 2 B + C B 2 C. 100 bread 30 slices ? sandwiches. Container 1. Zumdahl , Zumdahl , DeCoste , World of Chemistry 2002, page 269. Before and After Reaction 1. After the reaction. - PowerPoint PPT PresentationTRANSCRIPT
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GRILLED CHEESE SANDWICH
Bread + Cheese ‘Cheese Melt’
2 B + C B2C
100 bread 30 slices ? sandwiches
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CONTAINER 1
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 269
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BEFORE AND AFTER REACTION 1
All the hydrogen and nitrogen atoms combine.
Before the reaction After the reaction
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 269
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CONTAINER 2
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 270
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BEFORE AND AFTER REACTION 2
Before the reaction After the reaction
Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 270
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REAL-WORLD STOICHIOMETRY:LIMITING REACTANTS
LeMay Jr, Beall, Robblee, Brower, Chemistry Connections to Our Changing World , 1996, page 366
IdealStoichiometry
LimitingReactants
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LIMITING REACTANTS
aluminum + chlorine gas aluminum chloride
Al(s) + Cl2(g) AlCl3
2 Al(s) + 3 Cl2(g) 2 AlCl3
100 g 100 g ? g
A. 200 g B. 125 g C. 667 g D. ???
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LIMITING REACTANT: COOKIES1 cup butter 1/2 cup white sugar 1 cup packed brown sugar 1 teaspoon vanilla extract 2 eggs 2 1/2 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 2 cups semisweet chocolate chipsMakes 3 dozen
If we had the specified amount of ingredients listed, could we make 4 dozen cookies?
What if we had 6 eggs and twice as much of everything else, could we make 9 dozen cookies?
What if we only had one egg, could we make 3 dozen cookies?
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LIMITING REACTANTMost of the time in chemistry we have
more of one reactant than we need to completely use up other reactant.
That reactant is said to be in excess (there is too much).
The other reactant limits how much product we get. Once it runs out, the reaction s. This is called the limiting reactant.
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LIMITING REACTANTTo find the correct answer, we have to try
all of the reactants. We have to calculate how much of a product we can get from each of the reactants to determine which reactant is the limiting one.
The lower amount of a product is the correct answer.
The reactant that makes the least amount of product is the limiting reactant. Once you determine the limiting reactant, you should ALWAYS start with it!
Be sure to pick a product! You can’t compare to see which is greater and which is lower unless the product is the same!
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Coming up next…
STOICHIOMETRY APPLICATIONS
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Use a table to answer the questions