Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
the Periodic Table/Data Sheet, 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.
4
Fill in the boxes at the top of this page.
Answer all questions. 5
You must answer the questions in the spaces provided. Do not 6
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
8
the end of this book. Write the question number against your
answer(s). Section
All working must be shown. B
Do all rough work in this book. Cross through any work TOTAL
you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
IB/M/Jun22/
E7
7404/1
, 2
Do not write
outside the
Section A box
Answer all questions in this
section.
This0 question
1 is about ionisation energies of Group 2 elements.
0 1 .1 Explain why the first ionisation energy of the Group 2 elements
decreases down the group.
[2 marks]
0 1 .2 Give an equation, including state symbols, to represent the process that
occurs when the third ionisation energy of magnesium is measured.
[1 mark]
0 1 .3 Explain why the third ionisation energy of magnesium is much
higher than the second ionisation energy of magnesium.
[2 marks]
5
*02
IB/M/
* Jun22/7404/1
, 3
Do not write
outside the
This0 question
2 is about acid–base titrations. Citric box
acid reacts with sodium hydroxide.
C6H8O7(aq) + 3 NaOH(aq) → Na3C6H5O7(aq) + 3 H2O(l)
0 2 .1 A student makes a solution of citric acid by dissolving some solid citric acid in
water.
Describe a method to add an accurately known mass of solid to a
beaker to make a solution.
[2 marks]
0 2
.2 The student dissolves 0.834 g of citric acid in water and makes the
solution up to 500 cm3
Calculate the concentration, in mol dm–3, of citric acid in this solution.
[3 marks]
Concentration mol dm–3
*03
IB/M/
* Jun22/7404/1
, 4
Do not write
outside the
Turn over ►
*03
IB/M/
* Jun22/7404/1
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
the Periodic Table/Data Sheet, 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.
4
Fill in the boxes at the top of this page.
Answer all questions. 5
You must answer the questions in the spaces provided. Do not 6
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
8
the end of this book. Write the question number against your
answer(s). Section
All working must be shown. B
Do all rough work in this book. Cross through any work TOTAL
you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
IB/M/Jun22/
E7
7404/1
, 2
Do not write
outside the
Section A box
Answer all questions in this
section.
This0 question
1 is about ionisation energies of Group 2 elements.
0 1 .1 Explain why the first ionisation energy of the Group 2 elements
decreases down the group.
[2 marks]
0 1 .2 Give an equation, including state symbols, to represent the process that
occurs when the third ionisation energy of magnesium is measured.
[1 mark]
0 1 .3 Explain why the third ionisation energy of magnesium is much
higher than the second ionisation energy of magnesium.
[2 marks]
5
*02
IB/M/
* Jun22/7404/1
, 3
Do not write
outside the
This0 question
2 is about acid–base titrations. Citric box
acid reacts with sodium hydroxide.
C6H8O7(aq) + 3 NaOH(aq) → Na3C6H5O7(aq) + 3 H2O(l)
0 2 .1 A student makes a solution of citric acid by dissolving some solid citric acid in
water.
Describe a method to add an accurately known mass of solid to a
beaker to make a solution.
[2 marks]
0 2
.2 The student dissolves 0.834 g of citric acid in water and makes the
solution up to 500 cm3
Calculate the concentration, in mol dm–3, of citric acid in this solution.
[3 marks]
Concentration mol dm–3
*03
IB/M/
* Jun22/7404/1
, 4
Do not write
outside the
Turn over ►
*03
IB/M/
* Jun22/7404/1
