Oxford Cambridge and RSA
AS Level Chemistry A (H032)
A Level Chemistry A (H432)
Data Sheet
* 3 4 2 6 9 6 3 8 1 8 *
INSTRUCTIONS
• Do not send this Data Sheet for marking. Keep it in the centre or recycle it.
Chemistry A
INFORMATION
• This document has 4 pages.
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all
copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are
reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website
(www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest
possible opportunity.
For queries or further information please contact The OCR Copyright Team, The Triangle Building, Shaftesbury Road, Cambridge CB2 8EA.
OCR is part of Cambridge University Press & Assessment, which is itself a department of the University of Cambridge.
© OCR 2025 [601/5256/4] Chemistry A
DC (ST) 358154 CST263
for more: tyrionpapers.com
, 2
General Information
Molar gas volume = 24.0 dm3 mol−1 at room temperature and pressure, RTP
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, K w = 1.00 × 10−14 mol2 dm−6 at 298 K
1 tonne = 106 g
Arrhenius equation: k = Ae–Ea/RT or ln k = −Ea/RT + ln A
Gas constant, R = 8.314 J mol−1 K−1
Characteristic infrared absorptions in organic molecules
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
Aldehydes, ketones, carboxylic acids, esters,
C=O 1630–1820
amides, acyl chlorides and acid anhydrides
aromatic Several peaks in range
Arenes
C=C 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
© OCR 2025 Chemistry A
for more: tyrionpapers.com
,
13C NMR chemical shifts relative to TMS
C Cl
C Br
C
C C
C N
C C
C O C
C O C C
C C
220 200 180 160 140 120 100 80 60 40 20 0
δ / ppm
1H NMR chemical shifts relative to TMS
O H N H
CH
H
HC O O
O O
HC Cl HC C
C C C C HC R
HC Br
OH H H HC N
12 11 10 9 8 7 6 5 4 3 2 1 0
δ / ppm
Chemical shifts are variable and can vary depending on the solvent, concentration and substituents. As a result, shifts may be outside the ranges
indicated above.
for more: tyrionpapers.com
OH and NH chemical shifts are very variable and are often broad. Signals are not usually seen as split peaks.
Note that CH bonded to ‘shifting groups’ on either side, e.g. O–CH2–C=O, may be shifted more than indicated above.
© OCR 2025 Chemistry A
AS Level Chemistry A (H032)
A Level Chemistry A (H432)
Data Sheet
* 3 4 2 6 9 6 3 8 1 8 *
INSTRUCTIONS
• Do not send this Data Sheet for marking. Keep it in the centre or recycle it.
Chemistry A
INFORMATION
• This document has 4 pages.
Copyright Information
OCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all
copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are
reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website
(www.ocr.org.uk) after the live examination series.
If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest
possible opportunity.
For queries or further information please contact The OCR Copyright Team, The Triangle Building, Shaftesbury Road, Cambridge CB2 8EA.
OCR is part of Cambridge University Press & Assessment, which is itself a department of the University of Cambridge.
© OCR 2025 [601/5256/4] Chemistry A
DC (ST) 358154 CST263
for more: tyrionpapers.com
, 2
General Information
Molar gas volume = 24.0 dm3 mol−1 at room temperature and pressure, RTP
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, K w = 1.00 × 10−14 mol2 dm−6 at 298 K
1 tonne = 106 g
Arrhenius equation: k = Ae–Ea/RT or ln k = −Ea/RT + ln A
Gas constant, R = 8.314 J mol−1 K−1
Characteristic infrared absorptions in organic molecules
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
Aldehydes, ketones, carboxylic acids, esters,
C=O 1630–1820
amides, acyl chlorides and acid anhydrides
aromatic Several peaks in range
Arenes
C=C 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
© OCR 2025 Chemistry A
for more: tyrionpapers.com
,
13C NMR chemical shifts relative to TMS
C Cl
C Br
C
C C
C N
C C
C O C
C O C C
C C
220 200 180 160 140 120 100 80 60 40 20 0
δ / ppm
1H NMR chemical shifts relative to TMS
O H N H
CH
H
HC O O
O O
HC Cl HC C
C C C C HC R
HC Br
OH H H HC N
12 11 10 9 8 7 6 5 4 3 2 1 0
δ / ppm
Chemical shifts are variable and can vary depending on the solvent, concentration and substituents. As a result, shifts may be outside the ranges
indicated above.
for more: tyrionpapers.com
OH and NH chemical shifts are very variable and are often broad. Signals are not usually seen as split peaks.
Note that CH bonded to ‘shifting groups’ on either side, e.g. O–CH2–C=O, may be shifted more than indicated above.
© OCR 2025 Chemistry A
