4.5 Stoichiometry
Presentation
•
Science
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12th Grade
•
Practice Problem
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Medium
Standards-aligned
Rick La Belle
Used 1+ times
FREE Resource
12 Slides • 12 Questions
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Multiple Choice
Which of the following best explains the learning objective for stoichiometry?
To memorize chemical formulas
To explain changes in the amounts of reactants and products based on the balanced reaction equation
To list all types of chemical reactions
To describe the history of chemistry
4
Open Ended
Why is it important that no mass is lost or gained when a substance changes into a new substance during a chemical reaction?
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6
Multiple Choice
What is the primary requirement before performing any stoichiometric calculations?
Having a properly balanced chemical equation
Knowing the molar mass of all substances
Identifying the limiting reagent
Measuring the temperature and pressure
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8
Open Ended
Explain the steps you would take to solve a stoichiometry problem where you are given the mass of a reactant and asked to find the volume of a gas produced at STP.
9
Multiple Choice
Based on the stoichiometry map, which of the following can be directly converted to moles using Avogadro's Number?
Mass
Liters of Gas (at STP)
Liters of Solution (Given Molarity)
Particles
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11
Fill in the Blanks
Type answer...
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13
Multiple Choice
Which of the following best describes the limiting reagent in a chemical reaction?
The reactant that produces the most product
The reactant that is present in the greatest amount
The reactant that runs out first and limits the amount of product formed
The product that is formed in the smallest amount
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16
Multiple Choice
When solving a limiting reagent problem, why is it necessary to compare the amount of product formed from each reactant?
To determine which reactant is in excess
To find the total yield of the reaction
To identify the reactant that limits the amount of product formed
To balance the chemical equation
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Open Ended
Explain the difference between theoretical yield and actual yield in a chemical reaction. Why is it important to compare them?
20
Multiple Choice
If 21 grams of Fe2O3 is the theoretical yield but only 19.8 grams is obtained experimentally, what is the percent yield for this reaction?
94.3%
105.8%
85.2%
100%
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Open Ended
How much excess reactant is left over when 50 mL of 0.250 M iron (III) chloride (FeCl3) is reacted with 50 mL of 0.250 M sodium carbonate (Na2CO3) solution?
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Open Ended
Explain how the balanced reaction equation helps in determining the amounts of reactants and products in a chemical process.
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