1. Chem 106: Class/ Lab Week 12 Sign in / Pick up Papers
Select a partner for titration experiment, pp :
Complete 2 titration trials of acetic acid in an unknown vinegar sample within the first 90 minutes of lab LAST CALL: Turn in any past due work NOW for credit
Turn in today, from Week 10
Distillation (Course/ Lab Manual pg. 46)
Plus: Fermentation Post Lab on-line Ques. Handout
[Handout: Individually done] last 90 minutes of lab: Exam 2

2. “Acid” Rain
The pH of “clean” rain is slightly acidic ~5.6 (< 7 is acidic) due to the CO2 - carbonic acid, H2CO3 (aq), equilibrium, which will be discussed next week:
CO2 (g) + H2O(l) H2CO3 (aq) H3O+(aq) + HCO3-(aq)
Acids are also produced by the reaction of sulfur dioxide and sulfur trioxide with water, which adds to the acidity of rain.
SO2 (g) + H2O(l) H2SO3 (aq)
2 SO2 (g) + O2 (g) SO3 (g)
SO3 (g) + H2O(l) H2SO4 (aq)

3. Acidification Effects Related Limiting Reactant Experiment/ Demo Acid-Base Reactions & Behavior of Gases 1 1 1 1 1

4. Molar Mass = 84.00 g/mol mol = 2.00 g / 84.00 g/mol
molHCl = 1.0 mol/L x 1.00L/1,000mL
x 70.0 mL

5. V1 / n1 = V2 / n2
When HCl is the limiting reactant:
22.4 L / 1 mol = V2 / mol
VCO2 = mol x 22.4 L / 1 mol
VCO2 =
molHCl = 1.0 mol/L x 1.00L/1,000mL
x 70.0 mL
molHCl = mol

6. P1 V1 = P2 V2 V1 / n1 = V2 / n2 P V V n V1 / T1 = V2 / T2 V T
Isobaric process: pressure constant
Isochoric process: volume constant
Isothermal process: temperature constant
22.4 L, 1 mol, 273 K, 1.0 atm, R = L atm/ K mol
P1 V1 = P2 V2
P V
V1 / n1 = V2 / n2
V n
V1 / T1 = V2 / T2
V T

7. Acid Rain CO2 (g) + H2O(l) H2CO3 (aq) H3O+(aq) + HCO3-(aq)
SO3 (g) + H2O(l) H2SO4 (aq)
Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock.
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). About 10% of sedimentary rocks are limestones.
Effects on marble, limestone & (old) blackboard chalk, CaCO3?

8. Acid Rain
How does acid rain relate to global warming and energy policy?
Fossil fuels: coal and oil?

9. Energy Global Warming
Economy
Jobs
(Carbon)
(CO2)
(Carbon)
(CO2)

10. Energy Global Warming Economy Jobs (Carbon) (Carbon) (CO2) (CO2)

11. Energy Global Warming Economy Jobs (Carbon) (Carbon) (CO2) (CO2)

12. Global Warming, Your Carbon Footprint & Your Future
SEE:

13. Viewing/ Reading / Doing
Student Research & Writing Assignment
Global Warming, Your Carbon Footprint & Your Future
Capstone Writing & Peer Review Project

16. Revisions Posted Next Week
Viewing/ Reading / Doing
Global Warming, Your Carbon Footprint & Your Future
Capstone Writing & Peer Review Project
Assignment
Revisions Posted Next Week

17. Acid-Base Titration & Indicators
Acid-Base Titration & Indicators
M NaOH = mol/L
Provide Dr. R. with a 250 ml Erlenmeyer flask with your last names on it.
Check out a buret & 20. mL pipet.
Refer to pp : write unk. #
mol/L

18. Titration of Vinegar: Data, pg. 86) Dr. R. to sign today
Chem 106: Class Week 12
Titration of Vinegar: Data, pg. 86) Dr. R. to sign today
Post Lab Questions: Aqueous Solutions (Complete Course/ Lab Manual pg. 87) Due Week 13
Turn in Today
1. Course/ Lab Manual pg. 46
2. Fermentation Post Lab on-line Ques. (Handout)

19. Chem 106: Class/ Lab Week 12
Exam 2 Pick up Scantron, and Calculator if needed
Can use: 2 pages handwritten notes, which are to be turned in, plus Periodic Table allowed
After Turning in Exam:
Pick up Global Warming Handout Questions plus small Scantron
(Due next week)