The free response section is half of your AP Chemistry score and the part most students underprepare for. There are seven FRQs: three long questions worth 10 points each and four short questions worth 4 points each, for 46 raw points in 105 minutes. This page breaks down the format, the skills the questions test, and the scoring patterns that show up year after year in the rubrics.
FRQs
7
3 long + 4 short
Time
105 min
~22 min per long, ~10 per short
Raw points
46
3×10 + 4×4
Section weight
50%
Equal with MCQ
The four skills the FRQs test
FRQ Section II
College Board does not lock the topic or skill to a fixed question number, so treat the groupings below as skill families that appear across the seven questions, not a rigid question-by-question script. The three long questions carry the most multi-part reasoning; the four short questions each hit one focused skill.
01
Experimental design and data analysis
Long or short · Lab procedures, measurements, and graphing
Design or critique a procedure, choose what to measure with what glassware or instrument, and analyze real data. Often involves reading a titration curve, a Beer's law plot, or a rate-vs-concentration table and drawing a supported conclusion.
Name specific equipment and what it measures (buret for titrant volume, spectrophotometer for absorbance).
State what you vary, what you hold constant, and what you measure.
When asked to linearize, say exactly what to plot so the slope gives the quantity you want.
02
Writing and balancing equations
Often short · Net-ionic equations and predicting products
Write balanced chemical equations, including net-ionic equations, and predict the products of a reaction from the reactants given. Precipitation, acid-base, and redox reactions all show up.
Net-ionic means spectators are gone. Leave out ions that appear unchanged on both sides.
Balance both atoms and charge. An unbalanced charge loses the point even if atoms balance.
Include physical states when the question asks, and keep strong electrolytes dissociated.
03
Quantitative reasoning
Long questions · Stoichiometry, equilibrium, thermo, kinetics, electrochem
The calculation-heavy core: mole conversions and limiting reactant, equilibrium expressions and ICE tables, enthalpy and free energy, rate laws, and cell potential. Multi-step problems where a later part depends on an earlier answer.
Show the setup, not just the number. The rubric awards the correct expression before the arithmetic.
Carry units and significant figures through; a right number with wrong units can lose a point.
If a later part uses your earlier value, you usually still earn it even if the earlier value was off.
04
Particulate and qualitative reasoning
Long or short · Representations, models, and explanation
Explain observations at the particle level, draw or interpret particulate diagrams, and connect a model to macroscopic behavior. This is where conceptual understanding of structure, bonding, and intermolecular forces is graded directly.
Tie the explanation to particles. Reference specific interactions or forces, not vague trends.
When drawing a particulate diagram, match the number and type of particles the prompt specifies.
Answer the question asked; a correct chemistry fact that ignores the prompt scores nothing.
Five FRQ scoring patterns that show up every year
Drawn from published College Board rubrics
Setup before the number. Quantitative parts award a point for the correct expression or equation, separate from the arithmetic. Write the equilibrium expression or the enthalpy setup even when you are confident in the answer.
Justifications must cite chemistry. "Explain" and "justify" parts score zero without a reason, even if the conclusion is right. Name the principle (Le Chatelier, stronger intermolecular forces, larger K) and tie it to the specifics of the problem.
Net-ionic equations balance atoms and charge. Dropping spectator ions is only half the job; the charge must balance too. This is one of the most common single-point losses.
Error is carried, so keep going. Later parts that build on an earlier calculation usually still earn credit even if your earlier number was wrong. Do not leave a multi-part question blank because one step broke.
Units, states, and sig figs are graded. Missing units on a final answer, wrong physical states in an equation, or a wildly wrong significant-figure count can each cost a point the chemistry otherwise earned.
Released FRQs and scoring guides
Official College Board materials
The College Board posts each year's FRQs along with scoring guidelines and sample student responses on AP Central. Work through at least the most recent three administrations under timed conditions, then grade yourself against the published rubric to see exactly where points are awarded.
Because the seven-question structure (3 long, 4 short) has been stable, older released FRQs remain high-fidelity practice. Watch only for the current calculator-on-both-sections policy and the on-screen reference materials when you simulate exam conditions.
Stop losing FRQ points to the same misconceptions
FRQ losses are rarely about not knowing a formula. They are almost always a specific misconception: reversing a Le Chatelier shift, confusing rate and rate constant, mixing up the sign of ΔG, or treating a weak acid as fully dissociated. Diagnose which ones are costing you points.
Seven. The AP Chemistry free response section has three long questions worth 10 points each and four short questions worth 4 points each, for 46 raw points across 105 minutes. The section is worth 50 percent of the composite score.
How much is each AP Chemistry FRQ worth?
Each of the three long questions is worth 10 points and each of the four short questions is worth 4 points, for 46 raw points total. The free response section contributes 50 percent of your composite score, equal to the multiple choice section.
How long should I spend on each FRQ?
You have 105 minutes for seven questions. A workable split is roughly 22 minutes on each long question and about 10 minutes on each short question. The long questions have more independent parts and reward the extra time.
What topics are on the AP Chemistry FRQ?
The free response section draws on experimental design and data analysis, writing and balancing equations including net-ionic equations, quantitative reasoning across stoichiometry, equilibrium, thermodynamics, kinetics, and electrochemistry, and particulate or qualitative reasoning with diagrams and graphs. College Board does not lock a fixed topic to a fixed question number, so any of these can appear as a long or short question.
Can I use a calculator on the AP Chemistry FRQ?
Yes. A scientific or graphing calculator is permitted on both sections, and Bluebook provides a built-in Desmos calculator. The Equations and Constants sheet and the Periodic Table are also available while you work the free response section.
Do net-ionic equations need to be balanced for charge?
Yes. A net-ionic equation must balance both atoms and total charge, with spectator ions removed. Balancing atoms alone will not earn full credit if the charges do not also balance.
