1. Chemistry 202 Dr. Don DeCoste 3014 Chemistry Annex
11am-12pm Mondays and Wednesdays (after lecture)
10-11 am Tuesdays and 1-2 pm Thursdays
By appointment; open door policy

2. Chemistry Learning Center
2021 Chemistry Annex
Chemistry TAs available from 9 am – 5pm Mondays – Fridays. Link to the schedule is on the website (Contact Information)
Chemistry 202 TAs in the CLC:
Tuesdays: 3 – 5 pm (Siva)
Wednesdays: 1 – 3 pm (Tiffany)
Thursdays: 11am – 1 pm (Alex)

3. Lon-Capa 1st HW assignment due Friday, 9/7, 10 pm. It is open now.
1st Quiz due Sunday, 9/9 by 10 pm. It will open Friday, 9/7 at 5 pm.

4. For Today Textbook Homework Videos Chapter 3: Stoichiometry
Challenge Problem: Chapter 3 #128
Chapter 4: Solution Stoichiometry
Concentration and Dilution
Precipitation Reactions and Solubility Rules

5. For Friday Textbook Homework Videos Chapter 4: Solution Stoichiometry
Precipitation Stoichiometry I: Net Ionic Equations
Precipitation Stoichiometry II: Complete Equations
Challenge Problem: Chapter 4 #121

6. Clicker Question
You dissolve equal mass samples of different ionic compounds in separate beakers to make five solutions with equal volumes. Which of the following has the highest concentration in terms of molarity?
a) lithium chloride
b) potassium sulfate
c) sodium carbonate
d) magnesium nitrate
e) I am not sure how to do this.

7. Formulas for Ionic Compounds are Empirical Formulas

8. NaCl Dissociates into Ions

9. Clicker Question
Determine the volume of water required to add to 15.0 mL of 3.25M NaOH to make a solution with a concentration of 0.125M NaOH.
a) 26.0 mL
b) 187 mL
c) 254 mL
d) 375 mL
e) 390. mL

10. Concentration of Vinegar?
Knowing that vinegar is an aqueous solution that is 5.00% acetic acid [HC2H3O2(aq)] by mass and has a density of 1.01 g/mL, determine the concentration of vinegar in molarity.