1. Announcements Lab write-ups must be your own
Textbook Assignment due Friday in discussion
Electronic HW (Lon-Capa)
Wednesday 10:00 pm
Pre-Lecture Assignments (Lon-Capa)
Post-Lect 2/Pre-Lect 3 – Tuesday & Thursday 8:00 am
Lab write-ups must be your own
Memorization for the exam…

2. Atomic model and Charges

3. Memorize for Exam

4. Do Not Memorize for Exam (still helpful)

5. Memorize for Exam Ammonium NH4+ Sulfate SO42- Hydroxide OH- Sulfite
Nitrate
NO3-
Phosphate
PO43-
Nitrite
NO2-
Phosphite
PO33-

6. Naming Compounds Identify if you are working with metals or non-metals
Metal-Nonmetal Ionic
Nonmetal-Nonmetal Covalent
KCl Potassium chloride
MgBr2 Magnesium bromide
CaO Calcium oxide
CuBr Copper(I) bromide
FeS Iron(II) sulfide
PbO2 Lead(IV) oxide
CO2 Carbon dioxide
SF6 Sulfur hexafluoride
N2O4 Dinitrogen tetroxide

7. By the Exam…
Know the polyatomic ions and charges (Bottom of periodic practice table).
Know common ions and symbols (Should already be labeled on your periodic table)
Know covalent prefixes (Table 5.3) such as di, tri, tetra etc

8. Exam Info Evening Exams 7:00 pm Emphasis is on understanding
First one is September 24th
Conflict exam Same Day 5:00 pm
Emphasis is on understanding
40% Basic Knowledge & Skills (book problems, lecture questions)
40-50% Application Questions (Lon-Capa Wednesday HW, lab questions, lecture demonstrations)
10-20% New Problems (Same material, but connected in different ways, or extensions of other problems)

9. More Exam Info 15 multiple choice questions
2 multi-part free response questions
You will be asked to explain
You will be asked questions that link multiple topics together
You will be asked questions that you have not seen before that test your understanding and reasoning skills.

10. Everybody Writes
You have a pile of grams of dimes. You want a pile of pennies that has the same number of coins as the times pile. What mass of pennies do you need?
Mass = 3.1 grams
Mass = 2.6 grams

11. Chemistry Question
Now suppose you have a pile of grams of aluminum. What mass of copper has the same number of atoms as grams of aluminum?

12. Chemistry Question
1 mol = x 1023 atoms(or molecules)

13. Clicker Question #1 1.0 mol silicon 1.0 mol nitrogen gas
Select the sample that has the lowest mass.
1.0 mol silicon
1.0 mol nitrogen gas
1.0 mol oxygen gas
All three of the samples (a. – c.) above have approximately the same mass.
Only two of the samples (a. – c.) above have approximately the same mass.

14. Clicker Question #2 A) 10.0 g Cu B) 10.0 g Al 10.0 g Cu or 10.0 g Al
Which sample contains a greater number of atoms?
10.0 g Cu or 10.0 g Al
A) 10.0 g Cu
B) 10.0 g Al

15. Everybody Writes
You have 10.0 grams of aluminum. What mass of copper has same number of atoms as 10.0 grams of aluminum?

16. What is incorrect about this setup?
How many total atoms are present in 10.0 grams of aluminum chloride” (molar mass AlCl3 = g/mol)

17. Clicker #3
How many total atoms are present in 10.0 grams aluminum chloride (AlCl3, molar mass = g/mol)?
atoms
4.52×1022 atoms
9.65×1022 atoms
1.81×1023 atoms
1.93×1023 atoms

18. Memorize for Exam