AP Chemistry full-length public rehearsal
Full-length public practice, not a predicted AP score
Sixty original multiple-choice questions and seven original free-response tasks span all nine units. Three long responses have ten rubric points each; four short responses have four each. This is a transparent teaching set, not a secure exam, an official item bank, a statistically calibrated test or a claim of exact official weighting. Several questions deliberately revisit familiar lesson relationships; declare prior exposure and assistance.
Optional pacing: 90 minutes for multiple choice and 105 minutes for free response, or work untimed with any needed accessibility supports. The current official examination uses a hybrid digital/paper format; this local text workspace does not reproduce Bluebook or handwriting administration. Use scratch paper for diagrams and transcribe or describe the result with labels; retain paper artifacts separately.
Draft choices and writing save locally. Submit only when ready to freeze both sections; incomplete work remains recorded as incomplete. Submitting reveals keys and rubrics. Up to three immutable submissions are retained; later submissions are exposed practice and cannot replace the first.
Multiple-choice workspace
0/60 draft choices recorded.
Free-response workspace
Calibration, reaction and experimental design
Original packet: standards 0, 0.002, 0.004, 0.006 mol/L have absorbance 0.030, 0.130, 0.230, 0.330. A fivefold-diluted unknown acid gives 0.230±0.005. A separate 10.00 mL original aliquot has a measured endpoint volume of 20.0 mL of 0.0100 M base delivering one OH− equivalent per formula unit, before subtracting an exact 0.20 mL blank. The acid is stipulated monoprotic. All standard concentrations and volumetric terms are exact for the calculation, not claims about real equipment.
- Construct a labeled calibration representation and derive its slope and intercept. (2 rubric points)
- Infer original concentration and its bound from absorbance. (2 rubric points)
- Calculate titration concentration and compare with optical evidence. (2 rubric points)
- Design a check that could distinguish matrix interference from an endpoint bias. (2 rubric points)
- Explain one limitation of the exact-volume assumption and one limitation of agreement. (2 rubric points)
0/7 nonempty draft responses. Presence of text is not a reasoning-quality check.
Format source checked 30 October 2026: official examination information. Content relationships follow the course framework and the source-backed Unit 1–9 lessons. No official exam prose is reproduced.
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