1. Do Now
Name the different factors that effect reaction rates and describe the different effects that ONE of them has on a reaction.

2. What is Equilibrium?

3. Objective 1
Explain that equilibrium is established when forward and reverse reaction rates are equal.

4. What is chemical equilibrium?
Turns out that most reactions are reversible, they are going forward and backwards all the time
Reversible Reaction: A + B  C
ARROWS FOR REVERSIBLE REACTIONS
Both products and reactants are present

5. Chemical Equilibrium
Chemical Equilibrium: The point at which the rate of the forward and reverse reactions are equal.

6. How does equilibrium look?
Equilibrium Position: The relative concentrations of reactants and products when they reach equilibrium

7. Objective 2
Describe how the rate of chemical equilibrium will shift when altering the various environmental and physical conditions.

8. Real-World Example The Human Body is AMAZING!!!
Did you know that your body works to maintain dynamic equilibrium constantly.
Cells-Nutrients flowing in/out
Breathing-CO2 and O2
Bloodstream-HCO3- /CO32-
Temperature Regulation

9. Le Chatelier’s Principle
What factors effect the equilibrium of a reaction?
Changing concentration
Changing pressure
Changing temperature
These all produce a SHIFT in the equilibrium of a reaction
A SHIFT means that either more reactants or products are produced

10. Changing Concentration
Will always shift the reaction from the larger concentration to the smaller concentration.

11. Changing Pressure First, count the molecules (coefficients)
If pressure increases
If pressure decreases

12. Changing Temperature
If temperature increases the exothermic reaction will be favored.
If the reaction gets hotter it will try to cool down.
If temperature decreases the endothermic reaction will be favored.
If the reaction gets cooler it will try to heat up.

13. Le Chatlier’s Principle
If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.
WRITE THIS DOWN

14. Let’s look at Temperature Again
Is this equation Endothermic or exothermic?
What is H?
Where would heat appear in the equation?

15. Changing temperature

16. Shifting an Equilibrium
There are 3 ways to shift an equilibrium
Concentration of products or reactants
Changing temperature
Changing pressure

17. Exit Slip: Equilibrium
Title your paper “Exit Slip: Equilibrium”
Write your name, date, and period.
Number your paper 1-4 

18. Crash Course Equilibrium Video

19. Classwork
You are to work on the worksheet you received at the beginning of the class period.

20. Exit Slip: Equilibrium
2H2O2  2H2O + O2 + Heat
If I add heat, to which side will the eq. shift?
If I remove heat, to which side will the eq. shift?
If I add more H2O2, to which side will the eq. shift?
If I add more O2, to which side will the eq. shift?