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Announcements Tuesday, May 3. FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room. BRING YOUR 5” x 7” card with notes. BRING “problem” exams (misgraded, etc.) HELP SESSIONS: JUST DROP IN FOR HELP!!!! Wednesday at 5 pm, here Next Monday at 7 pm, TBA

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announcements tuesday may 3
AnnouncementsTuesday, May 3

FINAL

When: Tuesday, May 10, 7:30 – 9:30

Where: in our usual room.

BRING YOUR 5” x 7” card with notes.

BRING “problem” exams (misgraded, etc.)

HELP SESSIONS: JUST DROP IN FOR HELP!!!!

Wednesday at 5 pm, here

Next Monday at 7 pm, TBA

EXTRA CREDIT (10 PTS)

Find the error in the hydrogen car article.

today s factoids
Today’s Factoids

Population of China: 1,300,000,000 (20% of global population)

Population of USA: 300,000,000

Log10(China) = 9.1

Log10(USA) = 8.5

U.S. –awarded Ph.D.’s in science & engineering: ~25,000/year

a sample case
A sample case

2Na + 2H2O 2Na+ + H2 + 2OH-

Na was oxidized: Na  Na+ + e- (electron lost)

H was reduced: lost oxygen

O no change: lost H but gained e-

Remember…we actually ran this reaction by dumping

some sodium into water.

another one
Another one

2 CH3OH  2 CH2O + H2

C: ???

H: ???

H: ???

O: ???

secret agents all part of the semantics nightmare that is redox
Secret Agents: all part of the semantics nightmare that is RedOx
  • Something that promotes reduction: reducing agent
    • Example: K, Na, H, LiAlH4
  • Something that promotes oxidation: oxidizing agent
      • Example, O, F, Br, K2Cr2O7
main applications of redox
Main Applications of RedOx

Recovery of metals from ores

Corrosion

Prevention of corrosion

Batteries

slide9

Steel!

And the sons ofPullman porters & the sons of engineersRide their fathers\' magic carpet made of steel

Mothers with their babes asleep, rockin\' to the gentle beatAnd the rhythm of the rails is all they feel

City of New Orleans—Steve Goodman

reducing iron ore to make steel from rust to riches
Reducing Iron Ore to Make Steel:from rust to riches

2 Fe2O3 + 3C 4 Fe + 3CO2

From

Coal

Rust

i.e., ore

How steel is really made: http://www.sidmar.be/CONTENT/2c.htm

redox geography
RedOx & Geography

IRON ORE

CARS

COAL

electro reduction for aluminum
Electro-reduction for Aluminum

2Al2O3 4Al + 3O2

Electrons out

Power Plant

Electrons in

slide14

Hydroelectric

Power

Aircraft Industry

Hydroelectric

Power

corrosion
Corrosion

2 Fe  2 Fe+2 + 4 e-

4e- + 2H2O + O2  4OH-

Electrons travel down nail

batteries what if we could trap those electrons make em do some work before the reduction step
Batteries! What if we could trap those electrons, make ‘em do some work before the reduction step?
we are reliant on foreign oil http www worldfuturefund org wffmaster charts html energy us oil htm
We are reliant on foreign oil. http://www.worldfuturefund.org/wffmaster/Charts-HTML/Energy/us-oil.htm

U.S. oil

imports

as a percentage

of consumption

http www saudi us relations org newsletter saudi relations 12 html
http://www.saudi-us-relations.org/newsletter/saudi-relations-12.htmlhttp://www.saudi-us-relations.org/newsletter/saudi-relations-12.html
hybrid vehicles redox chemistry galore
Hybrid VehiclesRedOx Chemistry Galore

“The car Detroit wants you to believe cannot be built.”

But is that fair???

cool fuel cell links
Cool Fuel Cell Links

How Stuff Works Link:

http://science.howstuffworks.com/fuel-cell1.htm

http://science.howstuffworks.com/framed.htm?parent=fuel-cell.htm&url=http://education.lanl.gov/resources/h2/gottesfeld/education.html

more announcements
More Announcements

Pick up your HW4 papers!!

HW5 due 5 pm—no exceptions.

HW5 answers by e-mail

Monday evening help session, 5 pm

Tuesday 7:30 am Final Exam (300 pts)

Remember, only 5” x 7” cheat sheet

No-calculator bribe raised

to 17% for final.

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