AP CHEMISTRY UNIT 9 SELF CHECK

AP Chemistry Exam Prep – Unit 9 Rescue Pack

🌟 Common Mistakes (Watch Out!)

• Mistake 1: Misidentifying the anode and cathode in galvanic vs electrolytic cells.
• Mistake 2: Forgetting that electrons flow from anode to cathode.
• Mistake 3: Mixing up signs of E°cell in spontaneous vs nonspontaneous reactions.
• Mistake 4: Not balancing redox reactions in acidic or basic solution properly.
• Mistake 5: Forgetting to convert time/current to moles using Faraday’s law.

🎯 Grade Predictor Quick Test

Answer the following 5 questions to estimate your grade:

1. In a galvanic cell, where does oxidation occur?
Anode
Cathode
Salt bridge

2. What is true for a spontaneous electrochemical reaction?
E°cell > 0
E°cell < 0
Electrons flow from cathode to anode

3. What is reduced in the following reaction: Zn + Cu²⁺ → Zn²⁺ + Cu?
Cu²⁺
Zn
Zn²⁺

4. What is the correct equation for calculating E°cell?
E°cell = E°cathode - E°anode
E°cell = E°anode - E°cathode
E°cell = E°oxidation + E°reduction

5. What is the value of n in Faraday’s law for the reaction: 2Al³⁺ + 6e⁻ → 2Al?
3
6
2

📊 AP Score Estimator (Rough Guide for Unit 9 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 9)

• Review galvanic and electrolytic cell setups.
• Drill calculating E°cell and identifying spontaneous reactions.
• Quiz yourself on redox half-reactions and electrode labels.
• Practice redox balancing in acidic and basic conditions.
• Complete 10 MCQs and 2 FRQs from Unit 9.