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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
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
