DP Chemistry (last assessment 2024)

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Question 22N.1.sl.TZ0.16

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.sl.TZ0.16
Level sl Paper 1 Time zone TZ0
Command term Determine Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
22N.1.sl.TZ0.16

What initial rate of reaction can be determined from the graph?


A.  0.1 mol dm−3 s−1

B.  0.2 mol dm−3 s−1

C.  1.0 mol dm−3 s−1

D.  1.6 mol dm−3 s−1

[1]

Markscheme

A

Examiners report

Only 38% of the candidates were able to calculate the initial rate of reaction from the graph of concentration against time. The question had a strong discrimination between high-scoring and low-scoring candidates. The most commonly chosen distractor was D which was the initial concentration.

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