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OCR AS LEVEL JUNE 2022 CHEMISTRY B PAPER 2 QUESTION PAPER
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OCR AS LEVEL JUNE 2022 CHEMISTRY B PAPER 2 QUESTION PAPER
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OCR A LEVEL 2022PAPERS AND
MARKSCHEMES
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, Oxford Cambridge and RSA
Friday 27 May 2022 – Afternoon
AS Level Chemistry B (Salters)
H033/02 Chemistry in depth
Time allowed: 1 hour 30 minutes
You must have:
* 9 0 7 5 1 1 8 6 8 3 *
• the Data Sheet for Chemistry B
You can use:
• a scientific or graphical calculator
• an HB pencil
* H 0 3 3 0 2 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 20 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2022 [601/5446/9] OCR is an exempt Charity
DC (CE/JG) 301083/3 Turn over
, 2
Answer all the questions.
1 The element magnesium is an important Group 2 metal. Its presence in distant stars has been
shown using atomic emission spectra.
(a) (i) The atomic emission spectrum of an element shows a series of coloured lines on a
black background.
Describe how the appearance of the absorption spectrum of the element is similar to
and different from its emission spectrum.
Similar ...............................................................................................................................
...........................................................................................................................................
Different .............................................................................................................................
...........................................................................................................................................
[2]
(ii) What evidence for the structure of atoms is provided by atomic spectra?
...........................................................................................................................................
...................................................................................................................................... [1]
(b) Ionisation enthalpies have also been used to develop theories about atomic structure.
(i) Write an equation for the reaction that represents the first ionisation enthalpy of
magnesium.
Include state symbols.
[2]
(ii) The first ionisation enthalpies of the elements of Period 3 show a general increase
across the period.
Explain this increase.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [3]
© OCR 2022
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