Rates of Reaction
20 past-paper questions on Rates of Reaction · examined 2020–2025.
20251 question
The diagram shows apparatus used to investigate two different reactions that produce gases. Which graph is correct?
20246 questions
A 2 g sample of calcium carbonate reacts with dilute hydrochloric acid as shown. Which change in conditions makes the reaction proceed more slowly?
Excess aluminium reacts with dilute hydrochloric acid. The hydrogen given off is collected in a gas syringe. Which statement is correct?
Gas P decomposes to form gas Q. Two experiments are done to investigate the rate of reaction. Which row is correct?
Fig. 5.1 shows how the volume of hydrogen changes with time as the reaction proceeds. Describe how the shape of the curve in Fig. 5.1 shows that the rate of reaction decreases with time.
Explain in terms of collision theory why the rate of reaction decreases with time.
The student repeats the experiment using the same mass of powdered zinc instead of large pieces of zinc. All other conditions stay the same. Describe and explain the difference in rate of reaction when powdered zinc is used.
20231 question
A student plans to investigate how the rate of the reaction changes when hydrochloric acid and calcium carbonate react. Which methods could be used to measure how the rate of reaction changes?
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