Q: Is there an H2 Chemistry formula sheet for A Levels (9476)? A: Use this page for the equations and relationships you still need to memorise or derive quickly. If you want the official SEAB PDF with constants and tables, start at the H2 Chemistry Data Booklet page instead.
TL;DR SEAB gives a Chemistry Data Booklet, not a complete formula sheet. This page is the memorisation route: setup equations, rearrangements, and when a value from the booklet still needs method working.
Use this page when your question is "what formulas must I know?". Use the H2 Chemistry Data Booklet 2026 page when your question is "where is the official SEAB table or constant?". Use the syllabus page when your question is "is this topic or paper still tested under 9476?".
Concrete example: The data booklet may give R, but you still need to know when to set up PV=nRT, which units match that value of R, and how to rearrange for n
Paper 4 practical preparation is separate from the theory-paper Data Booklet route.
Formula use checkpoint
Before searching the booklet, decide whether the missing piece is a data value, a setup equation, or a rearrangement.
Question clue
Look up from the booklet
Recall or derive yourself
Common trap
Gas pressure, volume, amount, and temperature
R and any stated standard conditions
PV=nRT, then rearrange for the unknown
Looking for a full gas-formula sheet instead of setting up the ideal gas equation.
Calorimetry with temperature change
Heat capacity data only if supplied
q=mcΔT, then link heat change to amount reacted
Treating the sign of ΔH as a booklet value.
Electrochemical cell from two half-cells
Relevant E∘ values
Identify cathode and anode, then calculate Ecell∘
Subtracting values in the table order without deciding oxidation and reduction first.
Buffer or weak-acid question
Given Ka, Kb, or Kw
Worked check: if a question gives 25.0cm3 of acid and a concentration in mol⋅dm−3, the booklet is not the first stop. Convert cm3 to dm3, use n=cV, then use the balanced equation ratio.
If you searched “H2 chem formula sheet” or “H2 Chemistry formula list”, what you are usually looking for is two different things:
What SEAB gives you on exam day: the official Chemistry Data Booklet (tables, constants, reference ranges).
What you must still carry in your head: core equations and standard relationships that let you turn the question into steps.
This post clarifies the boundary so you stop over-memorising tables, but also don’t get surprised by missing formulas.
Quick win box
Focus now: What to memorise vs reference.
High-yield priority: Know what SEAB provides and what you must recall.
60-minute drill: 20 min memorise list · 20 min apply list in questions · 20 min gap fill.
What SEAB actually provides (Chemistry Data Booklet)
SEAB supplies the official Chemistry Data Booklet for the written papers (see the cover page of the SEAB PDF). It typically includes:
What you still need to memorise (or derive quickly)
The data booklet is not designed to replace understanding. You should still memorise or be fluent with:
Core “setup” equations (high-frequency)
Mole relationships: n=Mm, n=NAN (SEAB’s data booklet lists the Avogadro constant as L).
Concentration: c=Vn (and unit conversions for dm3 vs cm3
Ideal gas: PV=nRT (choose R units that match P and V).
Electrochemistry “must-knows”
Cell potential: E∘∗cell=E∘∗cathode−Eanode∘.
Optional enrichment (not required explicitly by the 9476 syllabus):
Nernst (base-10 form at 298K): E=E∘−n0.0592log∗10Q. Use this only if your class/notes cover it or if the exam question provides the relationship; otherwise, focus on E∘∗cell and qualitative concentration effects.
Energetics “must-knows”
Calorimetry sign conventions and relationships (e.g., q=mcΔT, ΔH=−nq where appropriate).
Hess law logic (build a cycle cleanly; identify what is “given” vs “asked”).
Rearrangement checkpoint
When revising formulas, memorise the base relationship and the meaning of each variable before memorising rearranged versions. Most H2 Chemistry calculation errors come from choosing the wrong target quantity or mixing unit families, not from forgetting algebra.
Base relationship
First question to ask
Rearrangement move
Common trap
n=cV
Is the volume in dm3 if concentration is in mol⋅dm−3?
c=n/V or V=n/c.
Using cm3 directly with mol⋅dm−3.
PV=nRT
Do P, V, R, and T belong to the same unit system?
q=mcΔT
Is q the heat change of the solution or the reaction?
Find q, then connect to moles for ΔH.
Giving the calorimeter heat change as the molar enthalpy change.
E∘∗cell=E∘∗cathode−Eanode∘
Worked check: in calorimetry, 50.0cm3 of solution warms by 6.0K. If density is taken as 1.00g⋅cm−3, the solution mass is 50.0g, so q=mcΔT=50.0×4.18×6.0=1250J. The reaction enthalpy still needs the amount reacted and the sign convention; 1250J alone is not ΔH.
Misconception check: a formula sheet is not a list of final-answer templates. It is a set of relationships that must be matched to the target quantity, units, and chemical meaning in the question.
Acid-base and equilibria “must-knows”
Definitions of K∗c, K∗p, K∗a, K∗b (and the direction they describe).
Henderson-Hasselbalch form when a buffer approximation is valid: pH=pK∗a+log∗10[HA][A−]
How this affects your Paper 1-3 preparation
Treat the data booklet as a speed tool, not a memory crutch: you should know where to find values and what to do with them.
Is the H2 Chemistry “formula sheet” the same as the data booklet?
No. The data booklet is a reference booklet (tables/constants/reference ranges). Many formulas and relationships are not provided as a “sheet”, so you still need to memorise the high-frequency equations and be comfortable rearranging them.
Can I bring my own formula sheet into the A-Level exam?
No. SEAB provides a clean booklet for the written papers. Train under exam conditions by practising with an unmarked copy of the official data booklet and relying on memorised or derived formulas in your working.
What should I memorise first if I’m short on time?
Start with the setup equations n=Mm, c=Vn, and PV=nRT, then add the electrochem and buffer/equilibria relationships you use most often in Paper 2 and Paper 3.
