Exam (elaborations)
AQA Alevel Chemistry Paper 2 2022
- Course
- Institution
AQA Alevel Chemistry Paper 2 2022
[Show more]
Seller
Follow
ewanc2445
Reviews received
Content preview
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 2 Organic and Physical Chemistry
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 10
want to be marked. TOTAL
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105.
*Jun227405201*
IB/M/Jun22/E9 7405/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 An acidified solution of butanone reacts with iodine as shown.
CH3CH2COCH3 + I2 → CH3CH2COCH2I + HI
0 1 . 1 Draw the displayed formula for CH3CH2COCH2I
Give the name of CH3CH2COCH2I
[2 marks]
Displayed formula
Name
*02*
IB/M/Jun22/7405/2
, 3
Do not write
outside the
0 1 . 2 The rate equation for the reaction is box
rate = k[CH3CH2COCH3][H+]
Table 1 shows the initial concentrations used in an experiment.
Table 1
CH3CH2COCH3 I2 H+
Initial concentration / mol dm−3 4.35 0.00500 0.825
The initial rate of reaction in this experiment is 1.45 ×10−4 mol dm−3 s−1
Calculate the value of the rate constant, k, for the reaction and give its units.
[3 marks]
k
Units
0 1 . 3 Calculate the initial rate of reaction when all of the initial concentrations are halved.
[1 mark]
Initial rate of reaction mol dm−3 s−1
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun22/7405/2
, 4
Do not write
outside the
0 1 . 4 An experiment was done to measure the time, t, taken for a solution of iodine to react box
completely when added to an excess of an acidified solution of butanone.
Suggest an observation used to judge when all the iodine had reacted.
[1 mark]
The experiment was repeated at different temperatures.
1
Figure 1 shows how varied with temperature for these experiments.
t
Figure 1
*04*
IB/M/Jun22/7405/2
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 ewanc2445. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.88. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now