plumiRate of reaction: CAIE IGCSE Chemistry questions
Every CAIE IGCSE Chemistry exam question on 6.2 Rate of reaction, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Calculations
Q6(b)
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Q6(c)
The whole paper ↗![June 2024 Paper 3, question 6(c): The experiment is repeated using powdered sulfur. Describe the effect on the rate of reaction of using powdered sulfur rather than large pieces of sulfur. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062031-jun24-06-c-qp.webp)
Q6(d)(i)
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Q4(e)(iii)
The whole paper ↗![June 2024 Paper 4, question 4(e)(iii): State the effect that a catalyst has on the activation energy, Ea, of a reaction. [1] [Total: 10]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062041-jun24-04-eiii-qp.webp)
Q4(a)(i)
The whole paper ↗![Specimen Paper 3, question 4(a)(i): Suggest why the volume of hydrogen gas stays the same after 10 minutes. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062003-spec-04-ai-qp.webp)
Q4(a)(ii)
The whole paper ↗![Specimen Paper 3, question 4(a)(ii): Deduce the time taken from the start of the experiment to collect 20 cm3 of hydrogen gas. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062003-spec-04-aii-qp.webp)
Q4(a)(iii)
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Q4(b)
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Q5(a)(i)
The whole paper ↗![Specimen Paper 4, question 5(a)(i): State how the shape of the graph shows that the rate of reaction decreases as the reaction progresses. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062004-spec-05-ai-qp.webp)
Q5(a)(ii)
The whole paper ↗![Specimen Paper 4, question 5(a)(ii): Suggest why the rate of reaction decreases as the reaction progresses. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062004-spec-05-aii-qp.webp)
Q5(a)(iii)
The whole paper ↗![Specimen Paper 4, question 5(a)(iii): Deduce the time at which the reaction finishes. s [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062004-spec-05-aiii-qp.webp)
Q5(b)
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Q5(c)(ii)
The whole paper ↗![Specimen Paper 4, question 5(c)(ii): Explain why the rate of a reaction increases when temperature increases, in terms of activation energy and collisions between particles. [3] [Total: 10]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/062004-spec-05-cii-qp.webp)
All 23 questions on Rate of reaction, as a list
- June 2024, Paper 1, Q14 (1 mark): A method used to investigate the rate of reaction of calcium carbonate with dilute hydrochloric acid under different conditions is shown. Place 50cm3 of dilute
- June 2024, Paper 1, Q15 (1 mark): The rate of reaction between magnesium and hydrochloric acid is investigated. The total volume of hydrogen given off is measured at different times. A graph of
- June 2024, Paper 2, Q18 (1 mark): Powdered magnesium carbonate is added to excess dilute hydrochloric acid. The total volume of gas produced is measured over time. A graph of the results is show
- June 2024, Paper 2, Q19 (1 mark): Which statements explain why increasing the temperature changes the rate of a chemical reaction? 1 It increases the activation energy. 2 It increases the freque
- June 2024, Paper 3, Q6(b) (1 mark): Fig. 6.1 shows how the mass of sulfur changes as the reaction proceeds. 40 30 mass of 20 sulfur / g 10 0 0 20 40 60 80 100 120 140 time / seconds Fig. 6.1 Ded
- June 2024, Paper 3, Q6(c) (1 mark): The experiment is repeated using powdered sulfur. Describe the effect on the rate of reaction of using powdered sulfur rather than large pieces of sulfur. [1]
- June 2024, Paper 3, Q6(d)(i) (2 marks): Describe the effect, if any, each of the following has on the rate of this reaction. All other conditions stay the same. ● The temperature is decreased. ● T
- June 2024, Paper 4, Q4(e)(iii) (1 mark): State the effect that a catalyst has on the activation energy, Ea, of a reaction. [1] [Total: 10]
- Specimen, Paper 1, Q13 (1 mark): The diagram shows an experiment to measure the rate of a chemical reaction. dilute hydrochloric acid measuring cylinder metal water Which change decreases the r
- Specimen, Paper 2, Q14 (1 mark): The diagram shows an experiment to measure the rate of a chemical reaction. dilute hydrochloric acid measuring cylinder metal water Which change decreases the r
- Specimen, Paper 2, Q15 (1 mark): Which row describes the effect of increasing concentration and increasing temperature on the collisions between reacting particles? increasing concentration inc
- Specimen, Paper 3, Q4(a)(i) (1 mark): Suggest why the volume of hydrogen gas stays the same after 10 minutes. [1]
- Specimen, Paper 3, Q4(a)(ii) (1 mark): Deduce the time taken from the start of the experiment to collect 20 cm3 of hydrogen gas. [1]
- Specimen, Paper 3, Q4(a)(iii) (2 marks): The student repeats the experiment at 30 °C. All other conditions stay the same. Draw a line on the grid in Fig. 4.1 to show how the volume of hydrogen gas chan
- Specimen, Paper 3, Q4(b) (2 marks): The student repeats the experiment using zinc powder instead of small pieces of zinc. Describe how the rate of reaction differs when zinc powder is used. Give a
- Specimen, Paper 4, Q5(a)(i) (1 mark): State how the shape of the graph shows that the rate of reaction decreases as the reaction progresses. [1]
- Specimen, Paper 4, Q5(a)(ii) (1 mark): Suggest why the rate of reaction decreases as the reaction progresses. [1]
- Specimen, Paper 4, Q5(a)(iii) (1 mark): Deduce the time at which the reaction finishes. s [1]
- Specimen, Paper 4, Q5(b) (2 marks): The experiment is repeated using the same mass of smaller pieces of marble. All other conditions are kept the same. Draw a line on the grid in Fig. 5.2 to show
- Specimen, Paper 4, Q5(c)(ii) (3 marks): Explain why the rate of a reaction increases when temperature increases, in terms of activation energy and collisions between particles. [3] [Total: 10]
- Specimen, Paper 6, Q1(c)(i) (1 mark): Use Fig. 1.2 to determine the total volume of gas made in each experiment. total volume in Experiment 1 cm3 total volume in Experiment 2 cm3 [1]
- Specimen, Paper 6, Q1(c)(ii) (1 mark): Use your answers in (c)(i) to suggest what the student changed Experiment 2. [1]
- Specimen, Paper 6, Q1(c)(iii) (2 marks): On Fig. 1.2, sketch the curve expected if Experiment 1 is repeated using magnesium powder instead of magnesium ribbon. All other conditions remain the same. [2]
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