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Exemplar answers for planning a practical investigation (chemistry) SAQ
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This document contains exemplar answers for the planning a practical investigation (chemistry) SAQ document.

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  • September 11, 2024
  • 6
  • 2022/2023
  • Other
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DistanceLearningCentre.com
ANSWERS TO SAQS

Subject: Chemistry
Unit: Research
Topic: Research Methods (Chemistry)
Level: 3

SAQ 1:
Try to think of a rationale for each of the following questions:
a) Would a large antacid tablet have a faster or slower effect on
neutralising stomach acid than two smaller tablets?
b) Can pure aspirin be produced in a college laboratory?

Answers:
The following are some suggestions, although many correct
answers are possible. Your rationale should be sensible.
a) The size of the tablet sold to patients should be effective in
reducing the effects of stomach acid. If a larger one is more
effective, the producers could sell fewer tablets.
b) Teachers could use this information to test out different
production processes of aspirin or show how students could
assess the purity of aspirin so that tablets could be analysed.


SAQ 2:
Decide on a research title for the following investigations:
a) What is the best catalyst to use to speed up the decomposition
of hydrogen peroxide?
b) Does the size of antacid tablets affect the speed of
neutralisation of stomach acid?

Answers:
a) An investigation to identify the most effective catalyst in the
decomposition of hydrogen peroxide.
b) An investigation into the effect of tablet size on the speed of
neutralisation of stomach acid.




© DistanceLearningCentre.com, 2022 1

, Subject: Chemistry
Unit: Research
Topic: Research Methods (Chemistry)
Level: 3
ANSWERS TO SAQs


SAQ 3:
Identify the aim for the following questions:
a) Can pure aspirin be produced in a college laboratory?
b) Does the size of antacid tablets affect the speed of
neutralisation of stomach acid?

Answers:
a) Synthesise a pure sample of aspirin in the laboratory.
b) Assess the speed at which different sized antacid tablets
neutralise an acidic solution.

SAQ 4:
Identify some possible objectives for the following aims:

a) Aim:
To investigate if a pure sample of aspirin can be produced in a
college laboratory.

b) Aim:
To investigate whether tablet size affects the speed of
neutralisation of stomach acid.

Answers:
a)
i. Synthesise aspirin in the laboratory.
ii. Measure the purity of the sample produced.

b)
i. Collect information on the different size antacid tablets
available.
ii. Produce different size antacid tablets.
iii. Measure the speed of neutralisation of hydrochloric acid
for different sized tablets.
iv. Analyse the results to identify the most effective size of
tablet.




© DistanceLearningCentre.com, 2022 2

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