MHS AP Chemistry
Syllabus 15

 

Read Chapter 15
Section 15-1 The Concept of Equilibrium 
Know How equilibrium ties in with rates & reverse reactions
Read "Chemistry at Work" on page 562. How about that Haber guy?
Section 15-2 The Equilibrium Constant 
Equilibrium expression, "Law of Mass Action" 
Equilibrium constant
Kc vs. Kp
magnitude of K, "right-" and "left-" favored reactions
Kp = Kc(RT)Dn
Kf = 1/Kr
Section 15-3 Section 15.3 - Heterogeneous Equilibria 
  What is Kc for H2O(l) Û H+(aq) + OH–(aq)?
Section 15-4 Calculating Equilibrium Constants
In Class ex. 15.7
In Class ex. 15.8
Section 15-5 Applications of The Equilibrium Constant
Q (reaction quotient)
Section 15-6 le Chatlier's Principle
   
Problems 15.8, 15.10, 15.12, 15.16ab
  15.20, 15.22a, 15.24, 15.30, 15.36
  15.44
  15.50, 15.71
   
Lab 25 Determination of an Equilibrium Constant
   
[MHS AP Chem page]

 


Now for some questions...

For the reaction    2SO3(g) Û O2(g) + 2SO2(g)    Kc = 0.119 M.

  1. What would be the value of Kc for the reaction        4SO3(g) Û 2O2(g) + 4SO2(g)
  2. What would be the value of Kc for the reaction        O2(g) + 2SO2(g) Û 2SO3(g)
THINK ABOUT your body as a system of many competing equilibria.
  1. How does this relate to hunger, aging, tiring, cravings, reproduction, communication, health...
  2. How did your body know it was time for puberty? How will it know it's over?
  3. Why don't we keep growing forever?
  4. Can you think of two or three chemical equilibria in the body? Even if you don't know the exact chemistry involved, can you think of any qualitatively?
  5. Do the concepts of disease and chemical equilibria connect? What are "symptoms" in this framework?
  6. Can you think of a couple of ways you can affect any of the chemical equilibria in your bodies?
  7. Is it possible to change just ONE equilibrium in your body?
  8. From a chemical perspective, what is the purpose of pain?
  9. From a chemical perspective, what is the purpose of life?
[MHS AP Chem page]