AP CHEMISTRY UNIT 7 SELF CHECK

AP Chemistry Exam Prep – Unit 7 Rescue Pack

🌟 Common Mistakes (Watch Out!)

• Mistake 1: Confusing Q with K when predicting shifts in equilibrium.
• Mistake 2: Misinterpreting Le Châtelier’s Principle with pressure changes.
• Mistake 3: Incorrectly writing equilibrium constant expressions.
• Mistake 4: Not setting up ICE tables properly.
• Mistake 5: Forgetting to exclude solids and liquids from equilibrium expressions.

🎯 Grade Predictor Quick Test

Answer the following 5 questions to estimate your grade:

1. What does it mean if Q > K?
The reaction shifts left
The reaction shifts right
The system is at equilibrium

2. What happens if pressure increases on a system with more gas moles on the reactant side?
It shifts right
It shifts left
No change

3. What is excluded from equilibrium expressions?
Pure solids and liquids
Aqueous ions
Gases

4. What does a large K value (≫1) indicate?
Products are favored
Reactants are favored
Equal amounts of reactants and products

5. What is the correct form of the equilibrium constant expression for the reaction: N₂(g) + 3H₂(g) ⇌ 2NH₃(g)?
K = [NH₃]² / ([N₂][H₂]³)
K = [N₂][H₂]³ / [NH₃]²
K = [NH₃] / ([N₂][H₂])

📊 AP Score Estimator (Rough Guide for Unit 7 Mastery)

Enter your practice test scores to estimate your AP score:

MCQ Score (out of 60):

FRQ Score (out of 40):

📋 Final Week Action Checklist (Unit 7)

• Review Q vs K and Le Châtelier’s Principle examples.
• Practice ICE table setup + equilibrium calculations.
• Drill writing K expressions (omit solids/liquids).
• Complete 10 MCQs and 2 FRQs from Unit 7.
• Quiz yourself on pressure shifts and ICE shortcuts.