Stoichiometry, equilibrium, kinetics, thermo.
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Real Test
Full-length test
60 questions, 90 min countdown. Same length and pacing as the real exam.
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Warmup
Quick practice
Random questions across all topics. Pick a difficulty to dial up the challenge.
Targeted
Practice by topic
Drill one skill until it stops scaring you.
Smart Mix
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Pulls original, exam-style questions from the AP Chemistry bank by topic + difficulty, and tops up with fresh AI when the bank runs short.
AI · Fresh
Endless AI questions
Brand-new questions written by AI every time — no repeats. Great when you've drilled the bank dry.
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Adaptive help that explains your mistakes step-by-step.
Practice AP Chemistry free response
4 rubric-graded prompts. AI scores against an exam-style rubric.
Exam blueprint
60 MCQ + 7 FRQ. Each section 50% of score.
Unit 1Atomic Structure and Properties7–9%
Unit 2Compound Structure and Properties7–9%
Unit 3Properties of Substances and Mixtures18–22%
Unit 4Chemical Reactions7–9%
Unit 5Kinetics7–9%
Unit 6Thermodynamics7–9%
Unit 7Equilibrium7–9%
Unit 8Acids and Bases11–15%
Unit 9Applications of Thermodynamics13–17%
Source: College Board Course & Exam Descriptions, 2025–26.