Exam (elaborations)
AQA Alevel Chemistry Paper 1 2022
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AQA Alevel Chemistry Paper 1 2022
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Please write clearly in block capitals.Centre number Candidate number
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I declare this is my own work.
A-level
CHEMISTRY
Paper 1 Inorganic 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).
• All working must be shown. TOTAL
• 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 105.
*JUN227405101*
IB/M/Jun22/E11 7405/1
, 2
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*02*
IB/M/Jun22/7405/1
, 3
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 This question is about equilibria.
0 1 . 1 Give two features of a reaction in dynamic equilibrium.
[2 marks]
Feature 1
Feature 2
0 1 . 2 A gas-phase reaction is at equilibrium.
When the pressure is increased the yield of product decreases.
State what can be deduced about the chemical equation for this equilibrium.
[1 mark]
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun22/7405/1
, 4
Do not write
outside the
0 1 . 3 Carbon monoxide and hydrogen react to form methanol. box
CO(g) + 2 H2(g) ⇌ CH3OH(g)
0.430 mol of carbon monoxide is mixed with 0.860 mol of hydrogen.
At equilibrium, the total pressure in the flask is 250 kPa and the mixture contains
0.110 mol of methanol.
Calculate the amount, in moles, of carbon monoxide present at equilibrium.
Calculate the partial pressure, in kPa, of carbon monoxide in this equilibrium mixture.
[3 marks]
Amount of carbon monoxide mol
Partial pressure kPa
0 1 . 4 Give an expression for the equilibrium constant (Kp) for this reaction.
CO(g) + 2 H2(g) ⇌ CH3OH(g)
[1 mark]
Kp
*04*
IB/M/Jun22/7405/1
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