Oxford Cambridge and RSA
OCS AS LEVEL
CHEMISTRY A 2023
VERSION 2 DEPTH IN
CHEMISTRY GRADED A+
GUARANTEED PASS
ANSWERS AT THE LAST PAGE
AS Level Chemistry A
H032/02 Depth in chemistry
Time allowed: 1 hour 30 minutes
You must have:
* 7 6 4 9 0 9 1 6 8 4 *
• the Data Sheet for Chemistry A
(sent with general stationery)
You may use:
• a scientific or graphical calculator
* H 0 3 2 0 2 *
, First name(s)
Last name
INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Answer all the questions.
• Where appropriate, your answers should be supported with working. Marks may be
given for a correct method even if the answer is incorrect.
• Write your answer to each question in the space provided. If additional space is
required, you should use the lined page(s) at the end of this booklet. The question
number(s) must be clearly shown.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended responses will be assessed in questions marked with an
asterisk (*).
• This document consists of 20 pages.
,
, 2
Answer all the questions.
1 This question is about the properties and reactions of the Group 2 element strontium.
(a) The relative atomic mass of strontium can be determined using a mass spectrometer.
(i) Explain what is meant by the term relative atomic mass of an element.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
(ii) A sample of strontium has a relative atomic mass of 87.73.
The sample consists of:
• 82.9% Sr-88
• 6.9% Sr-87
• one other isotope.
Determine the other isotope of strontium in the sample.
isotope of strontium = .......................................................... [2]
© OCR 2023
OCS AS LEVEL
CHEMISTRY A 2023
VERSION 2 DEPTH IN
CHEMISTRY GRADED A+
GUARANTEED PASS
ANSWERS AT THE LAST PAGE
AS Level Chemistry A
H032/02 Depth in chemistry
Time allowed: 1 hour 30 minutes
You must have:
* 7 6 4 9 0 9 1 6 8 4 *
• the Data Sheet for Chemistry A
(sent with general stationery)
You may use:
• a scientific or graphical calculator
* H 0 3 2 0 2 *
, First name(s)
Last name
INSTRUCTIONS
• Use black ink. You may use an HB pencil for graphs and diagrams.
• Answer all the questions.
• Where appropriate, your answers should be supported with working. Marks may be
given for a correct method even if the answer is incorrect.
• Write your answer to each question in the space provided. If additional space is
required, you should use the lined page(s) at the end of this booklet. The question
number(s) must be clearly shown.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended responses will be assessed in questions marked with an
asterisk (*).
• This document consists of 20 pages.
,
, 2
Answer all the questions.
1 This question is about the properties and reactions of the Group 2 element strontium.
(a) The relative atomic mass of strontium can be determined using a mass spectrometer.
(i) Explain what is meant by the term relative atomic mass of an element.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
(ii) A sample of strontium has a relative atomic mass of 87.73.
The sample consists of:
• 82.9% Sr-88
• 6.9% Sr-87
• one other isotope.
Determine the other isotope of strontium in the sample.
isotope of strontium = .......................................................... [2]
© OCR 2023
