1. Reaction Rates! How can you make a chemical reaction speed up?
Today
Reaction Rates!
How can you make a chemical reaction speed up?
Foldable notes
H2O2 lab

2. Write on your paper if these reactions are fast or slow
Rxn Rates
Write on your paper if these reactions are fast or slow
A rusting nail
Combustion engine
A burning log
Bread molding

3. Combustion of gasoline
How can we speed it up?
Nail rusting
Log burning
Bread molding
Combustion of gasoline

4. What is a reaction?
You’ve got to COLLIDE!

5. Activation Energy- energy needed to start the reaction
A catalyst LOWERS the activation energy (i.e. makes it easier to react!)

6. How to increase collisions?
Temp.
Surface Area
Foldable time!
Read p
One sentence on how each speeds up a reaction (# of collisions)
Reaction
Rate
Concentration
Catalyst

7. Increase # of particle collisions!
To speed up a reaction…
Increase # of particle collisions!
Make it hotter
Make it more concentrated
Crush it!
Add a “spark”

8. More chances of collisions
Concentration
More chances of collisions
To increase Molarity= either add more mol of particles or decrease volume

9. __H2O2  __H2O + __O2 Add 10ml H2O2 to a beaker Anything happening?
Add 1 pinch of yeast
Anything yet?
Stir it.
What did you make?
=2qlb8X_ffO8

10. Why do we keep food in the refrigerator?
Exit Slip
To speed up a reaction, you need to increase the # of ________ between particles
Why do we keep food in the refrigerator?

11. Next Unit….Acids and Bases!
Name any acids and bases off the top of your head
What is an acid?
What are its properties?
Sour or tangy taste
Bases are bitter and slippery

12. Phosphoric acid Hydrosulfuric acid Hydrofluoric acid Nitric acid
Acid Formulas!
Phosphoric acid
Hydrosulfuric acid
Hydrofluoric acid
Nitric acid
Sulfuric acid

13. Arrhenius (not a pirate) Bronsted-Lowry Lewis
Three Acid Models
Three definitions of an acid thanks to:
Arrhenius (not a pirate)
Bronsted-Lowry
Lewis

14. Acidic solution: H+ > OH- Basic solution: H+ < OH-
pH Scale (measures H+)
Acid
Neutral
Base
Acidic solution: H+ > OH-
Basic solution: H+ < OH-

15. Lake Natron – Salty, Alkaline (basic) lake
Trees killed from acid rain

16. H2O (l) + H2O (l) OH- + H3O+ Self-ionization
Water produces = amounts of H+ and OH-, so it’s neutral
Hydronium ion
Self-ionization

17. Arrhenius Acids produce H+ in solution HCl  H+ + Cl-
Bases produce OH-
NaOH  Na+ + OH-

18. Arrhenius’s Problem Bronsted-Lowry
NH3 and Na2CO3 don’t have OH- groups, but still are bases…
Bronsted-Lowry
Acids: H+ donor
Bases: H+ acceptor

19. Write the formula or name
Sodium phosphate
Calcium hydroxide
Carbon pentahydride
ZnCO3
Fe2S3

20. Homework! (That’s right!)
Identify 6 substances around your house (3 acid, 3 base)
Must include its pH (Google it)
Its properties or uses
Due Friday!

21. Exit Slip The rate of reaction is affected by what 4 factors?
What is the difference between an acid and a base?