1. Unit 2, Lesson 11: Equilibrium Calculations – Part III
These calculations are extremely difficult. During this section of the unit, it will be especially important to pay close attention to the examples given, and to do the assigned practice problems.

2. Example E
Keq = 3.5 for SO2(g) + NO2(g) SO3(g) + NO(g). If 4.0 mol of SO2(g) and 4.0 mol of NO2(g) are placed in a 5.0 L bulb and allowed to come to equilibrium, what concentration of each species will exist at equilibrium?
Note: square both sides of the equation to solve for x – 10 min

3. Brain Break!

4. SO2(g) + NO2(g) SO3(g) + NO(g).
Example F
A 1.0 L reaction vessel contained 1.0 mol of SO2, 4.0 mol of NO2, 4.0 mol of SO3, and 4.0 mol of NO at equilibrium according to
SO2(g) + NO2(g) SO3(g) + NO(g).
If 3.0 mol of SO2 is added to the mixture, what will be the new concentration of NO when equilibrium is re-attained?
NB: Start by finding Keq. Addition is written on the “I” line. – 10 min

5. Practice Time!
Pg. 71 #55-60
25 min