Practice AP Chemistry free-response questions scored against AP rubric criteria. FRQs cover stoichiometry, equilibrium, thermodynamics, kinetics, and more.
AP Chem FRQ Format
- 3 long free-response questions (10 pts each)
- 4 short free-response questions (4 pts each)
- 105 minutes for all 7 questions
AP Chemistry Practice · All AP Courses
What AP science FRQ graders reward
Science free response is scored on whether you apply concepts, not whether you recall them. The reliable point-earners: a precise claim that answers the exact question asked; evidence drawn from the data, graph, or experiment described; and reasoning that explicitly links the evidence to the claim with the right concept. When a prompt says "justify," "explain," or "support your answer," it is asking for that evidence→claim link — and that is where most points are won or lost.
The mistakes that cost the most points
- Restating the data instead of interpreting it — "the line goes up" isn't analysis; say what it means.
- Vague claims ("it affects the cell") — name the specific structure, process, or variable.
- Experimental design: forgetting to identify the independent/dependent variable or a control.
- Skipping the "because" — a claim with no reasoning earns partial credit at best.
AimFive grades your free-response answers point-by-point on the official rubric with published accuracy data — write one and see exactly which points you earned. Start practicing free.
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