Multiple choice
60 questions · 1 hour 30 minutes · 50%
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AP Chemistry exam prep
Develop particulate-level explanations, quantitative models, laboratory reasoning, and evidence-based arguments across structure, reactions, kinetics, equilibrium, and thermodynamics.
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AP Chemistry exam format
Hybrid digital. Formats can change, so verify the linked official page before exam day.
Official College Board exam page ↗Free response
7 questions · 1 hour 45 minutes · 50%
AP Chemistry unit roadmap
Each unit is a connected part of the course, not an isolated chapter. The focus says what you must know and the weighting says how much exam time it is worth. Use the weighting to order your review, never as permission to skip a prerequisite.
Atomic Structure and Properties
Moles, spectra, electron configuration, periodic trends
- Define the vocabulary you need to explain moles, spectra, electron configuration, periodic trends.
- Draw and label the graph, model, diagram, or evidence that best represents atomic structure and properties.
- Solve one direct atomic structure and properties question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Particle diagrams with conservation
Compound Structure and Properties
Bonding, Lewis structures, forces
- Define the vocabulary you need to explain bonding, lewis structures, forces.
- Draw and label the graph, model, diagram, or evidence that best represents compound structure and properties.
- Solve one direct compound structure and properties question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Unit-aware calculations
Properties of Substances and Mixtures
Intermolecular forces, solutions, spectroscopy
- Define the vocabulary you need to explain intermolecular forces, solutions, spectroscopy.
- Draw and label the graph, model, diagram, or evidence that best represents properties of substances and mixtures.
- Solve one direct properties of substances and mixtures question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Equilibrium versus kinetics
Chemical Reactions
Equations, stoichiometry, titration
- Define the vocabulary you need to explain equations, stoichiometry, titration.
- Draw and label the graph, model, diagram, or evidence that best represents chemical reactions.
- Solve one direct chemical reactions question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Acid-base species and approximations
Kinetics
Rate laws, mechanisms, activation energy
- Define the vocabulary you need to explain rate laws, mechanisms, activation energy.
- Draw and label the graph, model, diagram, or evidence that best represents kinetics.
- Solve one direct kinetics question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Claim-evidence-reasoning on FRQs
Thermochemistry
Energy, calorimetry, enthalpy
- Define the vocabulary you need to explain energy, calorimetry, enthalpy.
- Draw and label the graph, model, diagram, or evidence that best represents thermochemistry.
- Solve one direct thermochemistry question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Particle diagrams with conservation
Equilibrium
K, Q, Le Châtelier, solubility
- Define the vocabulary you need to explain k, q, le châtelier, solubility.
- Draw and label the graph, model, diagram, or evidence that best represents equilibrium.
- Solve one direct equilibrium question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Unit-aware calculations
Acids and Bases
pH, buffers, titration, structure
- Define the vocabulary you need to explain ph, buffers, titration, structure.
- Draw and label the graph, model, diagram, or evidence that best represents acids and bases.
- Solve one direct acids and bases question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Equilibrium versus kinetics
Thermodynamics and Electrochemistry
Entropy, Gibbs energy, cells
- Define the vocabulary you need to explain entropy, gibbs energy, cells.
- Draw and label the graph, model, diagram, or evidence that best represents thermodynamics and electrochemistry.
- Solve one direct thermodynamics and electrochemistry question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Acid-base species and approximations
Use a diagnostic to find the first knowledge gap
This short check is not a score prediction. It identifies which part of the course deserves your next focused session.
- Answer without notes.
- Explain your choice before revealing feedback.
- Record every uncertain answer, including lucky guesses.
Question 1 of 3
Scored skills for the AP Chemistry exam
Knowing an idea internally is not enough. Practice producing observable evidence under time pressure.
Model matter and processes
Design questions and methods
Represent data and phenomena
Analyze models
Use mathematical routines
Develop scientific arguments
Highest-value review targets
- Particle diagrams with conservation
- Unit-aware calculations
- Equilibrium versus kinetics
- Acid-base species and approximations
- Claim-evidence-reasoning on FRQs
AP Chemistry formulas and reference relationships
A useful sheet records meaning and conditions, not isolated symbols. Rebuild it from a blank page until every line comes back with its conditions attached.
Moles and particles
\[n=\frac{m}{M},\qquad N=nN_A\]
What it tells you: Converts among sample mass, moles, and representative particles.
Use it when: Use molar mass in matching mass units and $N_A=6.022\times10^{23}\,\mathrm{mol}^{-1}$.
Example: $18.0$ g water is about $1.00$ mol or $6.022\times10^{23}$ molecules.
Ideal gas law
\[PV=nRT\]
What it tells you: Relates pressure, volume, amount, and absolute temperature for an ideal gas model.
Use it when: Temperature must be kelvin and the value of $R$ must match pressure and volume units.
Example: At fixed $n,T$, doubling volume halves pressure.
Beer–Lambert law
\[A=\varepsilon bc\]
What it tells you: Connects solution absorbance with path length and concentration.
Use it when: The selected wavelength and concentration range should obey linear response.
Example: A calibration-line slope can be used to infer an unknown concentration.
Gibbs free energy
\[\Delta G^\circ=\Delta H^\circ-T\Delta S^\circ=-RT\ln K\]
What it tells you: Connects thermodynamic driving force with enthalpy, entropy, temperature, and equilibrium.
Use it when: Use kelvin and consistent energy units; standard-state quantities differ from nonstandard $\Delta G$.
Example: $K>1$ corresponds to $\Delta G^\circ<0$.
What the AP Chemistry exam hands you, and what you have to recall
| Section or part | What you may use | What that means for your work |
|---|---|---|
| Multiple choice | No calculator | This is the rule that surprises students most. Every multiple-choice number must be estimated or cancelled by hand. |
| Free response | Scientific or graphing calculator | Full arithmetic allowed - and expected, with the setup shown. |
| Provided for the whole exam | Periodic table and equations and constants sheet | Both sections get them. Practise finding a value on the sheet quickly instead of memorising constants. |
Anything the table does not hand you, you have to remember. The AP Chemistry study plan puts these rules on a week-by-week schedule.
Your AP Chemistry preparation plan
Repeat this loop weekly: retrieve, diagnose, repair, mix, time, and reflect.
01
AP-style practice
Original questions, immediate explanations, and local progress.
Start →02Full course test
A timed mixed-unit test with a complete answer review.
Test →03Study plan and strategy
Eight weeks, plus the timing, calculator, and task-verb decisions.
Plan →04Unit roadmap
Every unit, its weighting, and what mastery looks like.
Review →05Formula review
Key relationships, their conditions, and what the exam provides.
Recall →Questions about the AP Chemistry exam
Can I use a graphing calculator on the AP Chemistry exam?
Rules change from section to section. Multiple choice: no calculator. Free response: scientific or graphing calculator. Provided for the whole exam: periodic table and equations and constants sheet. Practise each section under its own rule.
How long is the AP Chemistry exam?
Multiple choice: 1 hour 30 minutes, 60 questions. Free response: 1 hour 45 minutes, 7 questions. Multiple choice — About 1.5 minutes each with no calculator. Practise cancelling units and rounding to one significant figure to check which answer is possible. Free response — About 15 minutes each. The long questions carry far more points than the short ones - do not spend equal time on all seven.
Which AP Chemistry unit is weighted most heavily?
Properties of Substances and Mixtures (18–22%) carries the largest published weighting. Use the weighting to order your review, not to skip a prerequisite that a heavier unit depends on.
Is a formula sheet given on the AP Chemistry exam?
Yes. The AP Chemistry exam gives you the periodic table and equations and constants sheet. Both sections get them. Practise finding a value on the sheet quickly instead of memorising constants.
Use AI responsibly during AP exam preparation
Attempt first. Ask for a hint or critique. Close the explanation and solve again from memory. Never use outside help on a live or prohibited assessment.
Turn the guide into exam-day skill
Start a focused AP Chemistry practice set, check each explanation, and use every miss to choose your next review session.
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