DP Chemistry (last assessment 2024)

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Question 22M.2.hl.TZ2.4a(iii)

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.hl.TZ2.4a(iii)
Level hl Paper 2 Time zone TZ2
Command term Calculate Question number a(iii) Adapted from N/A
a(iii).
[Maximum mark: 2]
22M.2.hl.TZ2.4a(iii)

Hydrogen and iodine react to form hydrogen iodide.

H2 (g) + I2 (g) ⇌ 2HI (g)

The following experimental data was obtained.

(a(iii))

Calculate the value of the rate constant stating its units.

[2]

Markscheme

k=«1.2×10-6 mol dm-3 s-12.0×10-3 mol dm-3×3.0×10-3 mol dm-3=»0.20 ✔

mol–1 dm3 s–1 ✔

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