Key Takeaways
Lesson Description
Key Takeaways
• Chemical equilibrium occurs when forward and reverse reaction rates are equal.
• Equilibrium does not mean equal concentrations.
• The equilibrium constant (K) indicates the extent of a reaction.
• Large K favors products; small K favors reactants.
• Le Châtelier's Principle predicts how equilibrium shifts when disturbed.
• Temperature changes alter K; concentration and pressure shifts do not.
Must Know Equations
K = [Products] / [Reactants]
Q = [Products] / [Reactants]
Must Know Vocabulary
Equilibrium
Dynamic Equilibrium
Equilibrium Constant (K)
Reaction Quotient (Q)
Le Châtelier's Principle
AP Exam Focus
• Predict equilibrium shifts.
• Compare Q and K.
• Calculate equilibrium concentrations.