Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 3
Monday 15 June 2026 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements 1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. Section B
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). TOTAL
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 90.
Advice
• You are advised to spend 70 minutes on Section A and 50 minutes on Section B.
*JUN267405301*
IB/M/Jun26/G4005/E9 7405/3
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about the laboratory preparation of aspirin.
Aspirin is made by reacting 2-hydroxybenzenecarboxylic acid with ethanoic anhydride.
Concentrated phosphoric acid is used as the catalyst.
0 1 . 1 Draw the displayed formula for ethanoic anhydride.
[1 mark]
*02*
IB/M/Jun26/7405/3
, 3
Do not write
outside the
0 1 . 2 The reaction mixture is heated in the apparatus shown in Figure 1. box
Figure 1
State why the water should flow through the condenser from the bottom to the top and
not the other way round.
[1 mark]
0 1 . 3 State why the top of the condenser in Figure 1 should be open, with no bung or
thermometer.
[1 mark]
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun26/7405/3
, 4
Do not write
outside the
0 1 . 4 Impure aspirin is separated from the reaction mixture. box
The aspirin is then purified by recrystallisation using water as the solvent.
State, in terms of the solubility of aspirin, why water is a suitable solvent for this
recrystallisation.
[1 mark]
0 1 . 5 State how insoluble impurities and soluble impurities are removed during
recrystallisation.
[2 marks]
Insoluble impurities
Soluble impurities
*04*
IB/M/Jun26/7405/3
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 3
Monday 15 June 2026 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
• the Periodic Table/Data Booklet, provided as an insert (enclosed) Question Mark
• a ruler with millimetre measurements 1
• a scientific calculator, which you are expected to use where appropriate.
2
Instructions 3
• Use black ink or black ball-point pen. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside 6
the box around each page or on blank pages. Section B
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). TOTAL
• All working must be shown.
• Do all rough work in this book. Cross through any work you do not
want to be marked.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 90.
Advice
• You are advised to spend 70 minutes on Section A and 50 minutes on Section B.
*JUN267405301*
IB/M/Jun26/G4005/E9 7405/3
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about the laboratory preparation of aspirin.
Aspirin is made by reacting 2-hydroxybenzenecarboxylic acid with ethanoic anhydride.
Concentrated phosphoric acid is used as the catalyst.
0 1 . 1 Draw the displayed formula for ethanoic anhydride.
[1 mark]
*02*
IB/M/Jun26/7405/3
, 3
Do not write
outside the
0 1 . 2 The reaction mixture is heated in the apparatus shown in Figure 1. box
Figure 1
State why the water should flow through the condenser from the bottom to the top and
not the other way round.
[1 mark]
0 1 . 3 State why the top of the condenser in Figure 1 should be open, with no bung or
thermometer.
[1 mark]
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun26/7405/3
, 4
Do not write
outside the
0 1 . 4 Impure aspirin is separated from the reaction mixture. box
The aspirin is then purified by recrystallisation using water as the solvent.
State, in terms of the solubility of aspirin, why water is a suitable solvent for this
recrystallisation.
[1 mark]
0 1 . 5 State how insoluble impurities and soluble impurities are removed during
recrystallisation.
[2 marks]
Insoluble impurities
Soluble impurities
*04*
IB/M/Jun26/7405/3
