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Essential Question:
Essential Question:
Which relationships can be derived from a balanced chemical equation?
Topic: Stoichiometry
Unit 8 Objectives:
Unit 8 Objectives:
1. Review:
• Determine the molar mass of a substance and use it to convert between the mass and mole measurements. (Unit 5)
• Relate coefficients and formulas to a molecular diagram of a reaction. (Unit 7)
• Given a chemical reaction stated in words, write a balanced chemical equation. (Unit 7)
2. Starting with a balanced chemical equation and the number of moles of a reactant or product, determine the number of moles of any other reactant or product involved. (Moles --> Moles)
3. Starting with a balanced chemical equation and the mass of a reactant or product, determine the mass of any other reactant or product involved (Mass --> Mass)
4. Starting with a balanced chemical equation, the mass of one reactant, and mass of product actually produced, calculate the percent yield for the reaction.
5. Starting with a balanced chemical equation, and the mass of the reactants, determine which reactant is limiting, and why it limits the reaction, the theoretical yield of a product (limiting reactant).
6. Given a balanced chemical equation and the amounts of reactants, sketch molecular diagrams to represent the reaction mixture before and after the reaction.
Objective 1: Review relevant calculations and ideas
Objective 1: Review relevant calculations and ideas
Review of molar mass - reading
Online periodic table - useful reference if you don't have your periodic table with you
Objective 2: Moles to moles calculations - due by April 4
Objective 2: Moles to moles calculations - due by April 4
Learning targets for objective 2:
- I can understand what "stoichiometry" is
- I can construct a BCA table from a balanced chemical equation
- I can use a BCA table to calculate how many moles of a product are produced or how many moles of a reactant are used in a reaction
Key Vocabulary
- Stoichiometry
- Reactants
- Products
- Excess
Readings
Introduction to BCA tables (pdf) Khan Academy reading on stoichiometry (link)
Video lecture - objective 2
Supplemental videos
Objective 3: Mole- mass calculations - due by April 5
Objective 3: Mole- mass calculations - due by April 5
***Note that the date has changed. We will talk about this in class.***
Learning targets for objective 3:
- I can convert from moles to mass and from mass to moles
- Starting with a balanced chemical equation and the mass of a reactant or product, I can determine the mass of any other reactant or product involved using a BCA table
Key Skills:
- Dimensional analysis
Supplementary online activity
Objective 4: Percent yield of a reaction - due by April 10
Objective 4: Percent yield of a reaction - due by April 10
Readings
Learning targets for objective 4:
- Starting with a balanced chemical equation, the mass of one reactant, and mass of product actually produced, I can calculate the percent yield for the reaction.
Key Vocabulary
- Theoretical yield
- Percent yield
- Actual yield
Video Lecture 3 - Yields
Supplemental Video
Objectives 5 & 6: Limiting reactant and particle diagrams
Objectives 5 & 6: Limiting reactant and particle diagrams
Learning targets for objective 5:
- Starting with a balanced chemical equation, and the mass of the reactants, I can determine which reactant is limiting and the theoretical yield of a product.
Learning target for objective 6:
- Given a balanced chemical equation and the amounts of reactants, I can sketch molecular diagrams to represent the reaction mixture before and after the reaction.
Key Vocabulary
- Limiting reactant
- Excess reactant
Readings
Video lecture 4 - limiting reactant and particle pictures
**NOTE - you need to write a balanced chemical equation for the very last example problem before you solve it.
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