1. Catalyst
1. Identify the oxidized a reduced species in the reaction below:
S2O Cl2 + 5H2O  HSO H+ + 8Cl-
Write the reaction for:
2. Magnesium metal is reacted in
air.
End

2. Lecture 3.4 – Moles, Molarity, and Dilutions

3. Today’s Learning Targets
LT 3.7 – I can explain the concept of the mole and why it is an adequate means by which to express the amount of given substance.
LT 3.8 – I can determine the molarity of an unknown solution. Furthermore, I can determine the number of grams of substance in a solution if the molarity and volume are given.
LT 3.9 – I can determine the new concentration of a solution if a dilution is performed.

4. The Mole
Recall that Avogadro proposed that 1 mole = x 1023 particles.
If you have 1 mole this means you have x of this substance.

5. Grams to Moles Review
We can convert between the amount of a substance to moles by using the molar mass.

6. Table Talk
You have g of C6H12O6, how many moles do you have?

7. Molarity
Recall, we can calculate the concentration of solution using the molarity.

8. Class Example
How many grams of Na2SO4 are required to make a L of 0.5 M Na2SO4

9. Table Talk
How many grams of KNO3 are there in 15 mL of 0.5 M KNO3

10. Dilutions
If we change the volume of a solution, the molarity will also change.
We can calculate the new molarity of a solution if the initial and final volume are known.

11. Class Example
How many mL of 3.0 M H2SO4 are needed to make 450. mL of 0.10 M H2SO4?

12. Table Talk
How many mL of 5.0 M K2Cr2O7 solution will be diluted to prepare 250 mL of 0.1 M solution?

13. Connect 4

14. Exit Ticket
Calculate the molarity of a solution that contains 52 g of H2SO4 and occupies a volume of 250. mL
How many grams of AgNO3 are there in a M solution that occupies 3.5 L?
If you have a stock solution of AgNO3 that is M, what is the new concentration if you add 3 mL of this solution and dilute it to 500 mL?

16. Lab and Review of Unit Content Lab and Review of Unit Content
Monday
Tuesday
Wednesday
Thursday
Friday 24 25 26 27 28 1 2 3 4 5 8 9 10 11 12
Lab and Review of Unit Content
Lab and Review of Unit Content
Stoichiometry, Empirical Formulas, and Limiting Reactant
Stoichiometry, Empirical Formulas, and Limiting Reactant
Copper and Iodine Empirical Formula Lab
Period 5 Unit 3 Exam
Period 2 Unit 3 Exam
NO SCHOOL! National Holiday: Mr. Lance’s Birthday
Review for Mock AP Exam
Review for Mock AP Exam
Period 5 Mock AP Exam (All Unit 1 – 3 Content Covered)
Period 2 Mock AP Exam (All Unit 1 – 3 Content Covered)

17. Closing Time
Read 4.1 – 4.5
Complete homework 3.4