AP CHEMISTRY UNIT 8 SELF CHECK

AP Chemistry Exam Prep – Unit 8 Rescue Pack

🌟 Common Mistakes (Watch Out!)

• Mistake 1: Confusing strong and weak acids (strength ≠ concentration).
• Mistake 2: Forgetting to use ICE tables for weak acid/base problems.
• Mistake 3: Misapplying the pH = -log[H⁺] formula for bases.
• Mistake 4: Misidentifying the components of a buffer system.
• Mistake 5: Using incorrect ratios in the Henderson-Hasselbalch equation.

🎯 Grade Predictor Quick Test

Answer the following 5 questions to estimate your grade:

1. What is the conjugate base of H₂CO₃?
HCO₃⁻
CO₃²⁻
H₃O⁺

2. What is the pH of a 0.01 M HCl solution?
2
12
4

3. Which of the following is a buffer?
HF and NaF
HCl and NaCl
NaOH and KCl

4. What does a small Ka value indicate?
Weak acid
Strong base
Strong acid

5. What is the correct Henderson-Hasselbalch equation?
pH = pKa + log([A⁻]/[HA])
pH = -log([HA]/[A⁻])
pH = Ka + log([A⁻]/[HA])

📊 AP Score Estimator (Rough Guide for Unit 8 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 8)

• Review acid/base strength, conjugates, and ICE tables.
• Drill buffer problems using the Henderson-Hasselbalch equation.
• Quiz yourself on pH, Ka/Kb, and buffer logic.
• Complete 10 MCQs and 2 FRQs from Unit 8.
• Practice multi-step weak acid/base and buffer setups.