DP Chemistry (last assessment 2024)

Question 20N.1.hl.TZ0.19

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.1.hl.TZ0.19
Level	hl	Paper	1	Time zone	TZ0
Command term	Identify	Question number	19	Adapted from	N/A

19.

[Maximum mark: 1]

20N.1.hl.TZ0.19

Which change does not increase the rate of this reaction?

${CuCO}_{3} (s) + H_{2} {SO}_{4} (aq) \to {CuSO}_{4} (aq) + H_{2} O (l) + {CO}_{2} (g)$

A. Increasing the particle size of the ${CuCO}_{3}$

B. Increasing the temperature

C. Increasing the concentration of $H_{2} {SO}_{4} (aq)$

D. Stirring the reaction mixture

[1]

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Examiners report

Perhaps asking which factor does not affect a rate threw some candidates. 80% did get this correct but it was not a very discriminating question with higher and lower scorers performing equally well/poor.

Syllabus sections

Core

Core » Topic 6: Chemical kinetics » 6.1 Collision theory and rates of reaction

Core » Topic 6: Chemical kinetics

Question 20N.1.hl.TZ0.19

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