DP Chemistry (last assessment 2024)

Question 20N.2.hl.TZ0.2f(i)

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.2.hl.TZ0.2f(i)
Level	hl	Paper	2	Time zone	TZ0
Command term	Deduce, Justify	Question number	f(i)	Adapted from	N/A

f(i).

[Maximum mark: 1]

20N.2.hl.TZ0.2f(i)

Compound A is in equilibrium with compound B.

(f(i))

The equilibrium constant, $K_{c}$ , for the conversion of A to B is $1.0 \times 10^{8}$ in water at $298 K$ .

Deduce, giving a reason, which compound, A or B, is present in greater concentration when equilibrium is reached.

[1]

Markscheme

$B$ AND $K_{c}$ is greater than $1$ /large ✔

Examiners report

Most candidates identified B, the product, as being in greater concentration at equilibrium however some lost the mark because they did not include a reason.

Syllabus sections

Core

Core » Topic 7: Equilibrium » 7.1 Equilibrium

Core » Topic 7: Equilibrium

Question 20N.2.hl.TZ0.2f(i)

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