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GCSE Science Specimen Papers


Chemistry 4421
Additional Science 4463


ISA and marking guidelines
Revised Chemistry 2 - Rates of Reaction ISA C2/Specimen




Copyright © 2007 AQA and its licensors. All rights reserved.


The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England…

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Revised Specimen ISA C2 - Chemistry 2 ­ Rates of Reaction
This ISA relates to Unit C2: Additional Science (4463), and Chemistry (4421) section 12.4
Area of investigation
This work should be carried out during the teaching of the section relating to:
How can we control the rates…

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Surname Other Names

Centre Number Candidate Number

Candidate Signature Date



General Certificate of Secondary Education
June 2XXX / June xxx

SCIENCE / CHEMISTRY ASCC/CHYC/C1/Specimen
ISA C2/Specimen Rates of Reaction

To be conducted before 4 May 2xxx
For submission in May 2xxx or May 2xxx or May 2xxx


For…

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SECTION 1

These questions are about the investigation that you carried out.

Answer all questions in the spaces provided.


1 What were you trying to find out in your experiment?

..................................................................................................................................

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(2 marks)
2 Name one variable that you kept the same

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(1 mark)…

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b) What piece of equipment did you choose to make this measurement?

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(1 mark)
(c) What else could you have used instead of the equipment that you chose?

.............................................................................................................................................................

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(1 mark)
(d) Was the equipment that you used better or worse than the alternative?
Draw a ring around…

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SECTION 2

These questions are about an investigation that may be similar to the one you did.

Answer all questions in the spaces provided.



These questions are about Arpita's investigation into the reaction between hydrochloric acid and
calcium carbonate (limestone).
Arpita wanted to find out if the…

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10 Arpita measured the temperature of the acid before and after the reaction.
Why did she do this?

.............................................................................................................................................................

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(1 mark)

11 What sort of a variable was the acid concentration in this experiment?
Tick the box beside your choice.

A categoric variable

A continuous variable…

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14 Arpita calculated the mean of the three tests for each concentration.

(a) What should Arpita have done with the anomalous result when calculating the mean?

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(1 mark)
(b) Arpita calculated her means to 3 significant figures.
Do you think this was the right thing to…

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17 After her experiment, Arpita says, "I now know for a fact that higher concentrations of all
acids make limestone dissolve more quickly."
Her friend Arpan says, "That is just your opinion. You can't know that for a fact."
Who do you think is right? Is Arpita's…

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GCSE Science - Investigative Skills Assignment - Marking Guidelines
Chemistry 2/Specimen ­ Rates of reaction
For use in May xxxx or May xxxx
Please mark in red ink, and use one tick for one mark. Each part of each question must show some red ink to
indicate that it has…

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