AP Chemistry
Atomic structure, bonding, reactions, kinetics, equilibrium and thermodynamics. (College Board)
What the exam covers
- Atomic structure and properties
- Compound structure and properties
- Intermolecular forces and properties
- Chemical reactions
- Kinetics
- Thermodynamics
- Equilibrium
- Acids and bases
- Applications of thermodynamics
The most common mistakes, unit by unit
Atomic structure and properties
- Multiplying by molar mass when converting grams to moles. Converting grams to moles →
Compound structure and properties
- Calling any bond with a non-metal covalent without checking for a metal. Ionic vs covalent bonds →
Intermolecular forces and properties
- Forgetting to convert mL to L in molarity. Molarity and concentration →
Chemical reactions
- Changing subscripts instead of coefficients to balance. Balancing chemical equations →
- Miscounting atoms when a bracket and coefficient appear together. Counting atoms in a formula →
Kinetics
- Reading reaction order from the balanced equation's coefficients instead of from data.
Thermodynamics
- Mixing up the sign of ΔH: negative means heat is released (exothermic).
Equilibrium
- Putting solids and pure liquids into the equilibrium expression.
Acids and bases
- Thinking each pH step is a doubling — it's a tenfold change. Acids, bases and the pH scale →
Applications of thermodynamics
- Assuming an exothermic reaction is always spontaneous without considering entropy.
A 2-week study plan
- Day 1Atomic structure and properties
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 2Compound structure and properties
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 3Intermolecular forces and properties
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 4Chemical reactions
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 5Kinetics
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 6Thermodynamics
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 7Mixed review
- Redo every question you missed this week, without notes.
- Save anything still shaky as a miss so it comes back.
- Day 8Equilibrium
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 9Acids and bases
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 10Applications of thermodynamics
- Read the common mistake for each unit below.
- Do 10 questions and save every miss.
- Clear any reviews that are due.
- Day 11Review what's due
- Clear due reviews first.
- Retry the day's hardest question from scratch.
- Day 12Timed practice
- One timed set in AP Chemistry format.
- Mark it, then name the unit behind each wrong answer.
- Day 13Fix the gaps
- Practise only the units from yesterday's wrong answers.
- Explain each fix out loud in one sentence (Teach-back).
- Day 14Light review
- Clear today's due reviews — nothing new.
- Sleep well. You're done for today.
Free 5-question sample quiz
No signup. Tap an answer to see if you're right.
1. How many moles are in 36 g of water (molar mass 18 g/mol)?
2. To balance H₂ + O₂ → H₂O, the coefficients are:
3. A solution has pH 3. Compared with pH 5, it has how many times more H⁺?
4. 0.5 mol of NaCl is dissolved to make 250 mL of solution. The molarity is:
5. Which pair is most likely to form an ionic bond?
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