AP Chemistry exam-day guide
AP Chemistry · Prepare for the day ahead.
Your checklist
Your testing device with Bluebook installed and updated
AP Chemistry is a digital exam delivered in the College Board's Bluebook app. Before exam day, install Bluebook on the device you will use and run the exam-day readiness check or practice questions so the app is fully updated. Ask your AP coordinator or test center whether you will test on a personal device or a school-managed one, and whether any device restrictions apply - confirm with the provider, since device policies vary by school.
Charger and power cord for your device
Plan on a fully charged battery and bring the charger anyway. Seating may or may not have an outlet within reach, so ask your coordinator in advance; if power access is not guaranteed, make sure the device holds a charge comfortably beyond the full 3-hour 15-minute testing time.
An approved calculator
A four-function, scientific, or graphing calculator is permitted for the entire exam, both multiple-choice and free-response. Bring one you have used all year so you are not learning its menus during the test, and check that it is not on the prohibited list; verify the current calculator policy with the provider before exam day.
Extra batteries or a backup calculator
Graphing calculators die at the worst possible moments. Bring spare AAA/coin-cell batteries if your model uses them, or a second approved calculator as a fallback. Confirm with your coordinator that a backup device is acceptable to have at your seat.
Photo ID
If you are testing at a school other than your own, or as a homeschooled or independent student, you will typically need a government-issued or school-issued photo ID. Requirements differ by situation - confirm exactly what your test center requires with the provider rather than assuming.
Pencils and pens for scratch work
Even on a digital exam you will want to write out stoichiometry, ICE tables, and titration setups. Bring several sharpened pencils and a pen. Scratch paper should be provided by the test center, but ask your coordinator in advance so you know what is allowed at your seat.
Admission or room assignment information
Know your testing room, reporting time, and any check-in instructions. Bring any admission ticket or confirmation your school requires. If you have not received reporting details, contact your AP coordinator at least a week ahead - confirm with the provider, since check-in procedures differ between schools and test centers.
A watch that is not a smartwatch
A simple analog or digital watch helps you pace the free-response section, where managing time across long and short questions matters. Smartwatches and any device with communication or storage capability are not allowed in the testing room.
Water and a snack for the break
There is a scheduled break between the two sections. Keep food and drink out of the testing room and store them where you can reach them during the break. A snack and water help you stay sharp for the 1 hour 45 minute free-response section.
Familiarity with the reference tables in the digital format
A periodic table and an equations-and-constants sheet are provided during the exam. Practice opening and scrolling these in Bluebook beforehand so you are not hunting for a formula mid-question. Know roughly where to find kinetics, thermodynamics, and electrochemistry relationships.
A confirmed understanding of the exam structure
Know that Section I is 60 multiple-choice questions in 1 hour 30 minutes and Section II is 7 free-response questions (3 long, 4 short) in 1 hour 45 minutes, each section worth 50 percent. Knowing the shape of the test reduces surprise and helps you pace.
A plan to arrive early
Arrive with enough margin to complete check-in, set up your device, and get settled. Late arrival can affect whether you are admitted to the exam; confirm your center's late-arrival policy with the provider in advance.
Plan the day
Shift from learning new content to consolidating what you already know. Rework a small set of topics you have repeatedly missed - typically equilibrium, acid-base, and thermodynamics calculations - rather than skimming everything. Rehearse the free-response format under time pressure at least once, writing full answers including units, significant figures, and justification, because AP Chemistry scoring rewards correct reasoning and penalizes unsupported answers.
Do a logistics check: confirm your reporting time and room, verify your device runs Bluebook, test your calculator, and locate your ID. Resolve any uncertainty now rather than the morning of the exam. Confirm device, ID, and calculator policies with your AP coordinator, since these vary between schools and test centers.
Do a light review only: read your own summary of common pitfalls - forgetting to convert Celsius to kelvin, mixing up oxidation and reduction, ignoring limiting reactants, misreporting significant figures. Stop studying early enough to sleep a full night. Cramming new material this late costs more in fatigue than it gains in knowledge.
Pack everything: charged device plus charger, approved calculator plus backup batteries, pencils and pens, photo ID if required, admission information, water and snack, and a non-smart watch. Set two alarms. Charge the device overnight even though you will bring the charger.
Eat a real breakfast and arrive early. Do not attempt new content. If you review anything, look only at the equations-and-constants sheet to refresh where things are. At check-in, follow staff instructions, power down and stow your phone, and make sure your device is on the charger if an outlet is available.
Once seated, before the timer starts, open the reference tables in Bluebook so you know exactly how to reach them, and confirm your calculator is on and working. Take a few slow breaths. If something is wrong with your device or setup, raise your hand immediately - do not troubleshoot silently while the clock runs.
Budget about 90 seconds per question. Answer every question - there is no penalty for a wrong answer, so a blank is strictly worse than a guess. Most items are calculation-based, so use scratch paper for setups and watch units. If a calculation stalls for more than about two minutes, mark it, pick a plausible answer, and move on. Reserve the last few minutes to return to marked items.
Read carefully for the exact quantity requested - many missed points come from answering a related-but-different question, such as giving a concentration when the mass was asked for. Check that your answer is chemically reasonable: a pH outside 0 to 14, a negative kelvin temperature, or a rate constant with implausible magnitude usually signals an arithmetic error.
Stand up, drink water, eat your snack, and use the restroom. Do not compare answers with classmates - it only creates doubt and does not change anything. Take a couple of minutes to reset mentally for the free-response section, which is scored on reasoning rather than on a single final number.
Skim all seven questions first, then start with one you are confident about to build momentum. The 3 long questions are worth 10 points each and the 4 short questions 4 points each, so the long ones carry more weight per minute - but do not let one long question consume the entire section. A rough guide is about 15 to 18 minutes per long question and 8 to 10 minutes per short question, adjusted to your strengths.
Show every step: set up the expression, substitute values, state the result with units and correct significant figures, and give the requested justification. Partial credit is awarded for correct reasoning even when the final number is wrong, so a blank justification is the most expensive mistake you can make. When asked to justify or explain, write a complete sentence that names the principle involved rather than a bare number.
If you are running out of time, write the setup and the relevant relationship for the remaining parts rather than leaving them blank - a correct equation or a correctly identified principle can earn credit. In the final two minutes, confirm that every question has something written and that units and significant figures are present.
Rules to check
Bring a photo ID if you are testing at a school other than your own or as an independent or homeschooled candidate. ID requirements vary by situation, so confirm what your specific test center requires with the provider before exam day.
Phones, smartwatches, and any wearable or device with communication, camera, or storage capability must be powered off and stored outside the testing room. Possession of a prohibited device during testing can lead to score cancellation, so if you are unsure whether an item is allowed, leave it at home or ask your coordinator before check-in.
A four-function, scientific, or graphing calculator is permitted for the entire exam, including the multiple-choice section. Verify your model against the current approved list with the provider; do not bring a calculator with built-in communication or a prohibited feature.
There is a scheduled break between Section I and Section II. Remain in designated areas, keep all testing materials secured, and do not discuss exam content with anyone during the break or afterward. Specific break timing and movement rules are set by your test center - confirm them with the provider.
Both sections are scored with no penalty for incorrect answers, so answer every multiple-choice question and attempt every free-response part. Your composite score across the two equally weighted sections is converted to the 1 to 5 AP scale; the conversion thresholds are not published in advance and vary by year, so do not try to compute your own score mid-exam.
Follow all instructions from the test administrator and proctors immediately, including seating, device handling, and starting or stopping work. Working before the start signal or after the stop signal is given can invalidate your score regardless of how correct your answers are.
If your device malfunctions or the app freezes, stop and raise your hand right away. Do not attempt repairs or restart on your own unless instructed. Recovery procedures and any time adjustments are handled by the test center - confirm the escalation process with the provider so you know what to expect.
Report any irregularity, distraction, or security concern to the proctor during the exam rather than after. Concerns raised on the day are far easier to address than ones raised later, and documentation from the test center may be needed if you later request any accommodation or review.