lOMoAR cPSD| 22830792
AQA A-LEVEL CHEMISTRY PAPER 1
AQA A-Level Chemistry – Paper 1
Organic/Physical Practical Chemistry (University of Leicester)
, lOMoARcPSD| 22830792
A-Level Chemistry
AQA
Paper 1 – Inorganic and Physical Chemistry
Name ……………….
Date …………………
2 hours allowed
Possible Marks
Question
marks gained
1 9
2 8
3 8
4 14
5 15
6 14
7 10
8 8
9 19
Total 105
The Advanced Information from the exam board gives us a broad overview
of what is covered in the exam. The information was given in ranked order,
and this has been reflected in the mark allocation and topics on this paper.
There are questions in this paper that cover topics that are not listed by the
exam board. These are in the multiple-choice section and a few marks in low
tariff and synoptic questions – this is exactly what you should expect in the
exam.
01 Propanoic acid dissociates slightly in aqueous solution.
,lOMoARcPSD| 22830792
01.1 Write an expression for the acid dissociation constant Ka for propanoic
acid.
[1 mark]
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
01.2 The Ka value of propanoic acid is 1.35×10-5 moldm-3.
A buffer solution is prepared containing 2.15×10-2 mol of propanoic acid
and 1.50×10-2 mol of sodium propanoate in 1.00 dm3 solution.
I. Calculate the pH of the buffer solution 25°C.
[3 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
II. A small amount of aqueous NH3(aq) is added to the buffer solution.
Explain how the buffer solution would respond to the added NH3(aq).
[2 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
III. The student adds 0.25 g of Mg to 1.00 dm3 of the buffer solution.
Calculate the pH of the new buffer solution. (Mr = 24.3 g/mol)
[3 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
, lOMoARcPSD| 22830792
……………………………………………………………………………………………………………
02 A sample of X was analysed by mass spectrometry.
The following results were obtained for the atoms of X in the sample.
Relative isotopic mass Relative abundance
16 99.82
17 0.04
18 0.14
02.1 Calculate the relative atomic mass of element X.
Give your answer to two decimal places.
[2 marks]
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
02.2 Identify the element X.
[1 mark]
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
02.3 The most abundant isotope of the X in that sample was 16X.
Primrose Kitten – YouTube Tutorials for GCSE and A-Level
AQA A-LEVEL CHEMISTRY PAPER 1
AQA A-Level Chemistry – Paper 1
Organic/Physical Practical Chemistry (University of Leicester)
, lOMoARcPSD| 22830792
A-Level Chemistry
AQA
Paper 1 – Inorganic and Physical Chemistry
Name ……………….
Date …………………
2 hours allowed
Possible Marks
Question
marks gained
1 9
2 8
3 8
4 14
5 15
6 14
7 10
8 8
9 19
Total 105
The Advanced Information from the exam board gives us a broad overview
of what is covered in the exam. The information was given in ranked order,
and this has been reflected in the mark allocation and topics on this paper.
There are questions in this paper that cover topics that are not listed by the
exam board. These are in the multiple-choice section and a few marks in low
tariff and synoptic questions – this is exactly what you should expect in the
exam.
01 Propanoic acid dissociates slightly in aqueous solution.
,lOMoARcPSD| 22830792
01.1 Write an expression for the acid dissociation constant Ka for propanoic
acid.
[1 mark]
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
01.2 The Ka value of propanoic acid is 1.35×10-5 moldm-3.
A buffer solution is prepared containing 2.15×10-2 mol of propanoic acid
and 1.50×10-2 mol of sodium propanoate in 1.00 dm3 solution.
I. Calculate the pH of the buffer solution 25°C.
[3 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
II. A small amount of aqueous NH3(aq) is added to the buffer solution.
Explain how the buffer solution would respond to the added NH3(aq).
[2 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
III. The student adds 0.25 g of Mg to 1.00 dm3 of the buffer solution.
Calculate the pH of the new buffer solution. (Mr = 24.3 g/mol)
[3 marks]
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
……………………………………………………………………………………………………………
, lOMoARcPSD| 22830792
……………………………………………………………………………………………………………
02 A sample of X was analysed by mass spectrometry.
The following results were obtained for the atoms of X in the sample.
Relative isotopic mass Relative abundance
16 99.82
17 0.04
18 0.14
02.1 Calculate the relative atomic mass of element X.
Give your answer to two decimal places.
[2 marks]
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
02.2 Identify the element X.
[1 mark]
…………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………
02.3 The most abundant isotope of the X in that sample was 16X.
Primrose Kitten – YouTube Tutorials for GCSE and A-Level
