DP Chemistry (last assessment 2024)

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Question 20N.2.sl.TZ0.2d

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

Compound A is in equilibrium with compound B.

(d)

The equilibrium constant, Kc, for the conversion of A to B is 1.0×108 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 Kc is greater than 1/large ✔

Examiners report

Half of the candidates answered correctly. A common mistake was K > 0 instead of K > 1.

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