SPECIMAN ISA practice paper

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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
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The Assessment and Qualifications Alliance (AQA) is a company limited by guarantee registered in England and Wales (company number 3644723)
and a registered charity (registered charity number 1073334). Registered address: AQA, Devas Street, Manchester M15 6EX.
Dr Michael Cresswell, Director General.

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V 1.1
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 of chemical reactions?
RISK ASSESSMENT
It is the responsibility of the centre to ensure that a risk assessment is carried out.…read more

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Leave blank
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 this paper you must have:
For Teacher's Use
· results tables and charts or graphs from your own
investigation. Section Mark
You may use a calculator.…read more

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LEAVE
MARGIN
BLANK
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)
3 What name is given to variables that are kept the same during an experiment?
Tick the box beside your choice.…read more

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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 the answer.
Better/ Worse
Write down the reason for your answer.
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.............................................................................................................................................................…read more

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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 rate of reaction depended upon the concentration of the acid.
She used 5 different concentrations of acid, and measured the maximum pressure of the carbon
dioxide gas produced, using the apparatus shown below.…read more

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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
A dependent variable
A discrete variable
(1 mark)
12 There appears to be an anomalous result in Arpita's table.
(a) Put a circle around this result in Table 1.…read more

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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 do?
Tick the box beside your choice.…read more

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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 statement a fact or an opinion?
To gain full marks in this question you should write your ideas in good English.
Put them into a sensible order and use the correct scientific words.
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.............................................................................................................................................................…read more

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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 been seen.
Subtotals for each part of each question should be written in the right-hand margin.…read more

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