100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
AQA-7405-3-CHEMISTRY QUESTION PAPER 3-A LEVEL-21Jun2024. $12.49
Add to cart
Quickly navigate to
Preview
  2.  
  3. AQA CHEMISTRY
  4.  
  5. AQA CHEMISTRY

Exam (elaborations)

AQA-7405-3-CHEMISTRY QUESTION PAPER 3-A LEVEL-21Jun2024.
 0 purchase
  • Course
  • AQA CHEMISTRY
  • Institution
  • AQA CHEMISTRY

AQA-7405-3-CHEMISTRY QUESTION PAPER 3-A LEVEL-21Jun2024. 0 1 The structure of 2-hydroxybenzenecarboxylic acid is shown. 0 1 . 1 Give the equation for the reaction of 2-hydroxybenzenecarboxylic acid with methanol. In your equation, include the skeletal formula of the organic product. [2 marks] ...

[Show more]

Preview 4 out of 40  pages

Document information

  • October 13, 2024
  • 40
  • 2024/2025
  • Exam (elaborations)
  • Only questions

Subjects

  • aqa chemistry
  • 7405 3
  • paper 3 chemistry
  • aqa 7405 3 chemistry question paper 3 a level 2024
  • 2024 aqa chemistry paper 3

Written for

  • AQA CHEMISTRY
All documents for this subject (270)

Seller

avatar-seller
revisionmaster111

Reviews received

Content preview

000001




AQA
Please write clearly in block capitals.

Centre number Candidate number


Surname

Forename(s)

Candidate signature




T
I declare this is my own work.


A-level


ES
CHEMISTRY
Paper 3 B
Friday 21 June 2024 Morning Time allowed: 2 hours
E
Materials
For this paper you must have:
TH

For Examiner’s Use
• the Periodic Table/Data Booklet, provided as an insert (enclosed)
• a ruler with millimetre measurements Question Mark
• a scientific calculator, which you are expected to use where appropriate. 1
2
Instructions
3
• Use black ink or black ball-point pen.
LL




• Fill in the boxes at the top of this page. 4
• Answer all questions. 5
• You must answer the questions in the spaces provided. Do not write outside Section B
the box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of TOTAL
A




this book. Write the question number against your answer(s).
• 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.




IB/M/Jun24/G4006/E8 7405/3
Page 1 of 40

,000002

2
Do not write
outside the
Section A box


Answer all questions in this section.


0 1 The structure of 2-hydroxybenzenecarboxylic acid is shown.




0 1 . 1 Give the equation for the reaction of 2-hydroxybenzenecarboxylic acid with methanol.




T
In your equation, include the skeletal formula of the organic product.




ES
[2 marks]




B
Aspirin is produced from 2-hydroxybenzenecarboxylic acid by reaction with
E
ethanoic anhydride in the presence of concentrated phosphoric acid.
TH

Method

1. Add 2-hydroxybenzenecarboxylic acid to a conical flask.
2. Add excess ethanoic anhydride.
3. Add a few drops of concentrated phosphoric acid.
4. Heat the flask to 85 °C for 10 minutes.
5. Cool the flask and pour the contents into 150 cm3 of cold water.
LL




6. Filter and wash the impure solid aspirin.
7. Recrystallise the aspirin using a 50:50 mixture of water and ethanol.
8. Check the purity of the aspirin.
A




0 1 . 2 Aspirin can also be produced by reacting 2-hydroxybenzenecarboxylic acid with
ethanoyl chloride.

State why ethanoic anhydride is preferred to ethanoyl chloride for this preparation.
[1 mark]




*02*
IB/M/Jun24/7405/3
Page 2 of 40

,000003

3
Do not write
outside the
0 1 . 3 Give the name of the mechanism for the reaction of box

2-hydroxybenzenecarboxylic acid with ethanoic anhydride.
[1 mark]




0 1 . 4 Suggest the role of the concentrated phosphoric acid.
[1 mark]




0 1 . 5 Suggest why reflux is not essential when the flask is heated to 85 °C for 10 minutes.
[1 mark]




T
ES
0 1 . 6 Complete and label the diagram to show how the impure solid is filtered.
B [2 marks]
E
TH
LL
A




Question 1 continues on the next page


Turn over ►


*03*
IB/M/Jun24/7405/3
Page 3 of 40

, 000004

4
Do not write
outside the
0 1 . 7 box
Suggest the identity of two impurities present in the filtered solid aspirin before it is
washed in Step 6 of the method.
[2 marks]

Impurity 1

Impurity 2



0 1 . 8 Describe the recrystallisation process used to purify the aspirin.

Include the method and apparatus used.
[6 marks]




T
ES
B
E
TH
LL
A




*04*
IB/M/Jun24/7405/3
Page 4 of 40

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller revisionmaster111. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $12.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

69052 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$12.49
  • (0)
Add to cart
Added