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Specimen Paper
Centre Number Candidate Number For Examiner's Use

Surname

Other Names
Examiner's Initials
Candidate Signature

Question Mark
General Certificate of Secondary Education
Higher Tier 1

2

Additional Science Chemistry 2H 3

Unit Chemistry C2 4



Chemistry
Unit Chemistry C2
H 5

6

7

8
For this paper you must…

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Answer all questions in the spaces provided.


1 A student investigated the rate of reaction between marble and hydrochloric acid.

The student used an excess of marble.

The reaction can be represented by this equation:

CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(g)…

Page 3

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1 (a) (i) Complete the graph by drawing a line of best fit.
(1 mark)

1 (a) (ii) Use the graph to find the mass of the flask and contents after 1.8 minutes.

......................................... grams
(1 mark)

1 (a) (iii) The rate of…

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1 (c) A balance is used to measure the mass of the apparatus.

1 (c) (i) Which balance, A, B, or C, has the highest resolution?




The balance with the highest resolution is balance .
(1 mark)

1 (c) (ii) The balance used…

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2 The diagram shows the main parts of an instrumental method called gas
chromatography linked to mass spectroscopy (GC-MS).




This method separates a mixture of compounds and then helps to identify each of the
compounds in the mixture.

2 (a) In which part…

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2 (b) (i) Athletes sometimes take drugs because the drugs improve their performance. One of
these drugs is ephedrine.

Ephedrine has the formula:

C10H15NO

What relative molecular mass (Mr) would be recorded by GC-MS if ephedrine was
present in a blood sample taken…

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2 (c) Athletes are regularly tested for drugs at international athletics events.

An instrumental method such as GC-MS is better than methods such as titration.

Suggest two reasons why.

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(2 marks)

2 (d) When a blood sample is taken…

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3 Read the information in the box and then answer the question.

Aluminium is made by the electrolysis of aluminium oxide.
Aluminium oxide is an ionic compound containing aluminium ions (Al3+) and oxide ions
(O2­).
The diagram below shows the apparatus used to…

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3 (b) Aluminium is a metal.

Explain why aluminium conducts electricity.


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(2 marks)

8



4 Waste water from some industrial processes contains metal ions, such as chromium
ions. These metal ions must be removed from the water before the…

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5 Ammonia has the formula NH3

The diagrams show how electrons are arranged in nitrogen and hydrogen atoms.




5 (a) Draw a diagram to show how the electrons are arranged in an ammonia molecule.

You need only show the electrons in the highest…

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