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AP Chemistry Formula Sheet and Reference Tables

AP Chemistry formula sheet and reference tables explained. See what equations and data the College Board provides on exam day and what you must memorize.

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On AP Chemistry exam day, you receive a multi-page reference packet from the College Board — but it doesn't include everything. Knowing what's provided vs. what you must memorize is itself an exam skill.

What the AP Chemistry Reference Packet Includes

  • Periodic table with atomic numbers, symbols, and atomic masses.
  • Solubility rules for common ionic compounds.
  • Electrochemical series and standard reduction potentials (E° values).
  • Thermodynamic values — ΔH°f, S°, ΔG°f for selected substances.
  • Equations — ΔG = ΔH − TΔS, Nernst equation, Henderson-Hasselbalch, rate laws, equilibrium expressions, Arrhenius equation, and more.

What You Must Still Memorize

The reference packet doesn't give you polyatomic ion formulas (memorize NO₃⁻, SO₄²⁻, PO₄³⁻, NH₄⁺, etc.), strong acid/base lists, electron configuration rules, or gas laws (PV = nRT is provided, but Dalton's partial pressure law is not). Activity series of metals is also not provided.

How to Use the Reference Packet Efficiently

Practice using the real reference packet during every practice session so you know exactly where each value is. Students who are unfamiliar with the layout waste time searching on exam day. On FRQs, always cite the equation you're using from the reference packet — it shows your reasoning and earns setup points.

AP Chemistry Practice · AP Chemistry FRQ Guide · AP Chemistry Study Guide

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