0654.C6.2.03 — Describe practical methods for investigating the rate of a reaction including change in mass of a reactant or product and the formation of a: past paper questions

Real questions on 0654.c6.2.03 — describe practical methods for investigating the rate of a reaction including change in mass of a reactant or product and the formation of a

The newest 9 of 9 written questions. Open one to see it on the real paper.

1. 0654/32 · February/March 2026 · Q8a(i)[2]

   Suggest one piece of apparatus that is not shown in Figure 8.1 which the student needs to investigate the rate of the reaction. (iii) State the total volume of gas collected in experiment A. (iv) (v) Identify the experiment, A, B or C, that uses the lowest concentration of acid. Explain your answer. EOXPELIMENE EOXPlAM...

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2. 0654/32 · May/June 2025 · Q8b(i)[1]

   Name one other piece of apparatus needed to investigate the rate of this reaction.

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3. 0654/33 · May/June 2025 · Q8b(i)[1]

   Name one other piece of apparatus needed to investigate the rate of this reaction.

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4. 0654/33 · May/June 2025 · Q8b(ii)[1]

   The mass of the conical flask and contents decreases during the experiment. Explain why the mass decreases.

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5. 0654/33 · October/November 2022 · Q11a(v)[1]

   The experiment is repeated using large pieces of copper carbonate instead of powdered copper carbonate. State what happens to the rate of reaction.

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6. 0654/43 · May/June 2022 · Q8c(i)[1]

   State the volume of gas collected after 40 seconds. volume of gas = cm 3

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7. 0654/43 · May/June 2022 · Q8c(ii)[1]

   The reaction is fastest during the first 10 seconds. Explain why. �����������������������������������������������������������������������������������������������������������������������������������������������������

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What examiners said

Comprehensive responses • Most candidates correctly interpreted the information given and suggested a stopwatch as the other piece of apparatus needed. Limited responses • A few candidates could not use all the information given and suggested other pieces of apparatus such as a thermometer or stirring rod.

— Examiner report, February/March 2026, 0654/32 Q8(a)(i) (Cambridge)

Although many candidates suggested apparatus to measure time, measuring cylinder and thermometer were also regularly seen. A number of candidates suggested a chronometer or mobile phone to time, this is not standard apparatus used in practical science.

— Examiner report, May/June 2025, 0654/32 Q8(b)(i) (Cambridge)

Although many candidates suggested apparatus to measure time, measuring cylinder and thermometer were also regularly seen. A number of candidates suggested a chronometer or mobile phone to time, this is not standard apparatus used in practical science.

— Examiner report, May/June 2025, 0654/33 Q8(b)(i) (Cambridge)