Exam (elaborations)
aqa A-level Chemistry Paper 2 Organic and Physical Chemistry (7405-2)-QP-June2024.
- Course
- Institution
aqa A-level Chemistry Paper 2 Organic and Physical Chemistry (7405-2)-QP-June2024.
[Show more]
Content preview
aqaPlease 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 2 Organic and Physical Chemistry
Tuesday 18 June 2024 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.
6
You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 7
If you need extra space for your answer(s), use the lined pages at the end of 8
this book. Write the question number against your answer(s).
9
All working must be shown.
Do all rough work in this book. Cross through any work you do not want to 10
be marked. 11
TOTAL
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 105.
7405/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Propanone reacts with bromine in alkaline conditions.
CH3COCH3 + Br2 + OH– ⟶ CH3COCH2Br + Br – +
H2O
The rate equation for this reaction is
Rate = k [CH3COCH3] [OH–]
0 1 . 1 Sketch a graph on the axes provided to show how, at constant temperature, the
concentration of bromine changes during this reaction.
[1 mark]
final
, 3
Do not write
outside the
0 1 .2 Table 1 shows the initial rate of this reaction for experiments using different box
mixtures containing propanone, bromine and hydroxide ions.
Table 1
[CH3COCH3] [Br2] [OH–] Initial rate
Experiment
/ mol dm–3 / mol dm–3 / mol dm–3 / mol dm–3 s–1
1 1.50 × 10–2 2.50 × 10–2 2.50 × 10–2 2.75 × 10–11
2 1.50 × 10–2 2.50 × 10–2 8.25 × 10–11
3 3.75 × 10–3 5.00 × 10–2 1.00 × 10–1
Complete Table 1.
Use the data from experiment 1 to calculate the rate constant k for this reaction.
Give the units for the rate constant.
[5 marks]
k Units
Question 1 continues on the next page
Turn over ►
final
, 4
Do not write
outside the
0 1 . 3 Figure 1 shows an incomplete mechanism for this reaction. box
Figure 1
Complete the mechanism in Figure 1 by adding four curly arrows and any relevant
lone pair(s) of electrons.
[4 marks]
0 1 . 4 Use evidence from the rate equation to explain why Step 1 is the
rate determining step.
[1 mark]
11
final
The benefits of buying summaries with Stuvia:
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
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
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 isaacmdoss04. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.39. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now