Stoichiometry 4 w/Percent Yield
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Transcript of Stoichiometry 4 w/Percent Yield
Refresher on Class GuidelinesRefresher on Class Guidelines
• First off, most people in here do not need to be told this. You’re doing the right thing. It’s noticed and appreciated.
• Things that should not be done during class;
• Loud/disruptive behavior
• Rude behavior towards other students or the teacher
• Swearing/unprofessionalism
• Off-topic conversations / time wasting
• 3 Warnings and you’ll be asked to leave the class.
• You must come after school with your classwork to get credit.
AgendaAgendaAdmit Slip
Homework Review
Percent Yield and Notes
Classwork
Product: Notes and Classwork
Homework : Problems #1-3
Today’s ObjectivesToday’s Objectives• Students will be able to:
• Convert the mass or moles of one substance to the mass or moles of another substance in a balanced chemical reaction (Stoichiometry)
• Calculate percent yield
Percent Yield 3/29/11
Often in a chemical reaction, you do NOT make as much as you should make according to stoichiometry.
For every percent yield problem, you will calculate how much you SHOULD make of a product (the theoretical amount)
Also, you will be given an amount that is ACTUALLY made of that product.
You compare these two amounts through this equation.
Percent = Actual Amount Yield Theoretical Amount
Percent Yield ExamplePercent Yield Example
• 4 C3H5O + 15 O2 12 CO2 + 10 H2O
• In the lab, you only produce 10 mol of CO2 from 18 mol of O2. What is the percent yield?
• a) How many mol CO2 should you make?
• b) What is the percent yield?