DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.e.iii

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.hl.TZ0.e.iii
Level hl Paper 2 Time zone TZ0
Command term Annotate Question number e.iii Adapted from N/A
e.iii.
[Maximum mark: 1]
22N.2.hl.TZ0.e.iii

Chloroquine is a medication used to prevent and treat malaria.

Chloroquine can be synthesized by reacting 4,7-dichloroquinoline with another reactant, B.

            4,7-dichloroquinoline                                                            chloroquine

Annotate the Maxwell–Boltzmann distribution curve showing the activation energies, Ea, for the catalysed and uncatalysed reactions.

[1]

Markscheme

both Ea values marked AND left one labelled catalysed ✔

Examiners report

Most candidates correctly annotated the given Maxwell-Boltzmann diagram to illustrate the effect of adding a catalyst, however a few drew a second curve.

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