OCR A-level Chemistry A data sheet (H432): what is on it and what is not
A-level Chemistry: Year 1
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Formula sheet
The card below opens today's A-level Chemistry paper with this sheet in the drawer, so you practise the way you will sit the exam. The contents follow, grouped like the real sheet in our own layout and words. Check against OCR's Data Sheet (OCR 2020) before you rely on anything here.
A-level Chemistry: Year 1
General information
Also: 1 tonne = 10⁶ g.
| Quantity | Symbol | Value | Unit |
|---|---|---|---|
| molar gas volume at room temperature and pressure | V_m | 24.0 | dm³ mol⁻¹ |
| Avogadro constant | NA | 6.02 × 10²³ | mol⁻¹ |
| specific heat capacity of water | c | 4.18 | J g⁻¹ K⁻¹ |
| ionic product of water at 298 K | K_w | 1.00 × 10⁻¹⁴ | mol² dm⁻⁶ |
| gas constant | R | 8.314 | J mol⁻¹ K⁻¹ |
Characteristic infrared absorptions in organic molecules
Wavenumbers are in cm⁻¹.
| Bond | Location | Wavenumber / cm⁻¹ |
|---|---|---|
| C-C | Alkanes, alkyl chains | 750-1100 |
| C-X | Haloalkanes (X = Cl, Br, I) | 500-800 |
| C-F | Fluoroalkanes | 1000-1350 |
| C-O | Alcohols, esters, carboxylic acids | 1000-1300 |
| C=C | Alkenes | 1620-1680 |
| C=O | Aldehydes, ketones, carboxylic acids, esters, amides, acyl chlorides and acid anhydrides | 1630-1820 |
| Aromatic C=C | Arenes | Several peaks in range 1450-1650 (variable) |
| C≡N | Nitriles | 2220-2260 |
| C-H | Alkyl groups, alkenes, arenes | 2850-3100 |
| O-H | Carboxylic acids | 2500-3300 (broad) |
| N-H | Amines, amides | 3300-3500 |
| O-H | Alcohols, phenols | 3200-3600 |
NMR charts
Two charts: ¹³C NMR chemical shifts (0 to 220 ppm) and ¹H NMR chemical shifts (0 to 12 ppm), both relative to TMS, with the types of carbon or proton. OCR warns that shifts vary with solvent, concentration and substituents, and that O-H and N-H shifts are very variable and often broad.
What the OCR sheet lacks
- No electrode potentials and no electronegativity table.
- Apart from the Arrhenius equation, no formulae are printed. Not pH, the rate equation, K_(c) or the Gibbs equation.
- No Chemistry B (Salters) data: that specification is separate from A.
Four pages, packed tight
OCR's sheet is 4 pages: a general information block, a table of characteristic infrared absorptions, two NMR charts and the periodic table. Clean copies must be in the exam room and returned to the invigilator.
The general block is where chemists lose marks, because it mixes a molar gas volume of 24.0 dm³ mol⁻¹ with R = 8.314 J mol⁻¹ K⁻¹ and K_(w) at 298 K. Use the right one for the question.
Work out the relative atomic mass of an element from its isotopes and their abundances.
Press Mark to have your answer marked in the Atomic Structure course.
Worked example: activation energy
A plot of ln k against 1/T has a gradient of −5000 K. Find the activation energy.
The sheet gives ln k = −Eₐ/RT + ln A, so the gradient is −Eₐ/R. Convert to kilojoules at the end.
The OCR A sheet and the other boards
| Board | Sheet | What it holds |
|---|---|---|
| AQA | A-level Chemistry Data Booklet (7405), June 2023 series insert | Periodic table, an element list, three data tables (A infrared, B proton NMR, C carbon-13 NMR) and tables for phosphate and sugars, bases and amino acids; no table of constants |
| Edexcel | Data Booklet (9CH0), Issue 2, Summer 2017 | Physical constants, infrared, NMR, Pauling electronegativities, standard electrode potentials and the periodic table |
| OCR A (this guide) | Data Sheet for Chemistry A (H032, H432), 4 pages | General information including the Arrhenius equation, infrared, NMR charts and the periodic table |
| Eduqas | GCE AS/A level Chemistry Data Booklet (B410U10-1A) | Constants and conversions, infrared, carbon-13 and proton NMR, and the periodic table |
| WJEC | GCE AS/A level Chemistry Data Booklet | The same opening constants as Eduqas, then infrared, NMR and the periodic table |
| CCEA | Chemistry Data Sheet, GCE A/AS examinations (subject code 1110) | General information, infrared and proton NMR tables, and the periodic table |
OCR is the only board here whose sheet prints the Arrhenius equation, and it gives the specific heat capacity of water as 4.18 J g⁻¹ K⁻¹ like Eduqas and WJEC. Edexcel gives neither.
Exam answers
Answers to our daily papers come after you mark them. They are our own and not OCR mark schemes.
Daily papers for H432 students
Use Chemistry 1 for physical chemistry practice with the general information block and Chemistry 2 for organic and spectroscopy.
OCR sheet slips
- Using R in kJ rather than J.
- Reading the broad O-H range for an alcohol from the carboxylic acid row.
- Forgetting that shifts are variable and may fall outside the ranges.
Common questions
Do you get a data sheet in OCR A-level Chemistry A?
How long is the OCR chemistry data sheet?
What is the molar gas volume on the OCR sheet?
Is the Arrhenius equation on the OCR data sheet?
Is there a Chemistry B data sheet?
Revision cards
Say the answer first, then flip the card to check it.
Where to go next
- Solve it
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UK · A-levelA-level Chemistry data booklet: every board comparedWhat is in the A-level Chemistry data sheet for AQA, Edexcel, OCR, Eduqas, WJEC and CCEA, what is not, and how to use it in the exam.