AQA A-level CHEMISTRY Paper 3
7405-3-QP-Chemistry-A-23Jun23
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Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
CHEMISTRY
Paper 3
Friday 23 June 2023 AQA Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Booklet, provided as an insert (enclosed)
• a ruler with millimeter measurements
• a scientific calculator, which you are expected to use where appropriate. Question Mark
1
Instructions
• Use black ink or black ball-point pen. 2
• Fill in the boxes at the top of this page.
• Answer all questions. 3
• You must answer the questions in the spaces provided. Do not write outside the
box around each page or on blank pages. 4
• If you need extra space for your answer(s), use the lined pages at the end of this
5
book. Write the question number against your answer(s).
• All working must be shown.
6
Section B
TOTAL
• Do all rough work in this book. Cross through any work you do not want to be marked.
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2
Do not write
outside the
box
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.
*JUN237405301* IB/M/Jun23/E9 7405/3
IB/M/Jun23/7405/3
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Do not write
outside the . box
Section A
Answer all questions in this section.
0 1 Ethyl ethanoate can be made by reacting ethanol with ethanoic acid in the presence
of concentrated sulfuric acid.
Method
1. A mixture of ethanol, ethanoic acid, and concentrated sulfuric acid, with
anti-bumping granules, is heated under reflux for 10 minutes.
2. The apparatus is rearranged for distillation.
3. The mixture is heated to collect the liquid that distils between 70 and 85 °C
4. The distillate is placed in a separating funnel. Aqueous sodium carbonate is
added, and a stopper is placed in the funnel. The mixture is shaken, releasing
pressure as necessary.
5. The lower aqueous layer is removed and the upper organic layer is placed in a
small conical flask.
6. Anhydrous calcium chloride is added to the sample in the conical flask. The
flask is shaken well and left for a few minutes.
7. The liquid from the flask is redistilled and the distillate is collected between
74 and 79 °C
0 1 . 1 State the role of concentrated sulfuric acid in this reaction.
[1 mark]
0 1 . 2 The reaction mixture is flammable.
Suggest how the reaction mixture should be heated in step 1.
[1 mark]
Turn over ►
IB/M/Jun23/7405/3
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7405-3-QP-Chemistry-A-23Jun23
written by
maxmorden789
www.stuvia.com
Downloaded by: maxmorden789 | Want to earn £756
Distribution of this document is illegal extra per year?
, Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides
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
Friday 23 June 2023 AQA Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
• the Periodic Table/Data Booklet, provided as an insert (enclosed)
• a ruler with millimeter measurements
• a scientific calculator, which you are expected to use where appropriate. Question Mark
1
Instructions
• Use black ink or black ball-point pen. 2
• Fill in the boxes at the top of this page.
• Answer all questions. 3
• You must answer the questions in the spaces provided. Do not write outside the
box around each page or on blank pages. 4
• If you need extra space for your answer(s), use the lined pages at the end of this
5
book. Write the question number against your answer(s).
• All working must be shown.
6
Section B
TOTAL
• Do all rough work in this book. Cross through any work you do not want to be marked.
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Distribution of this document is illegal extra per year?
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2
Do not write
outside the
box
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.
*JUN237405301* IB/M/Jun23/E9 7405/3
IB/M/Jun23/7405/3
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3
Do not write
outside the . box
Section A
Answer all questions in this section.
0 1 Ethyl ethanoate can be made by reacting ethanol with ethanoic acid in the presence
of concentrated sulfuric acid.
Method
1. A mixture of ethanol, ethanoic acid, and concentrated sulfuric acid, with
anti-bumping granules, is heated under reflux for 10 minutes.
2. The apparatus is rearranged for distillation.
3. The mixture is heated to collect the liquid that distils between 70 and 85 °C
4. The distillate is placed in a separating funnel. Aqueous sodium carbonate is
added, and a stopper is placed in the funnel. The mixture is shaken, releasing
pressure as necessary.
5. The lower aqueous layer is removed and the upper organic layer is placed in a
small conical flask.
6. Anhydrous calcium chloride is added to the sample in the conical flask. The
flask is shaken well and left for a few minutes.
7. The liquid from the flask is redistilled and the distillate is collected between
74 and 79 °C
0 1 . 1 State the role of concentrated sulfuric acid in this reaction.
[1 mark]
0 1 . 2 The reaction mixture is flammable.
Suggest how the reaction mixture should be heated in step 1.
[1 mark]
Turn over ►
IB/M/Jun23/7405/3
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