DP Chemistry (last assessment 2024)

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Question 21M.2.hl.TZ2.7c

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Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.hl.TZ2.7c
Level hl Paper 2 Time zone TZ2
Command term Determine Question number c Adapted from N/A
c.
[Maximum mark: 2]
21M.2.hl.TZ2.7c

Consider the following equilibrium reaction:

2SO2 (g) + O2 (g) ⇌ 2SO3 (g)

(c)

SO2 (g), O2 (g) and SO3 (g) are mixed and allowed to reach equilibrium at 600 °C.

Determine the value of Kc at 600 °C.

[2]

Markscheme

[O2] = 1.25 «mol dm−3» AND [SO3] = 3.50 «mol dm−3» ✓

«Kc =3.5021.5021.25=» 4.36 ✓

 

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