DP Chemistry (last assessment 2024)

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Question 22M.2.hl.TZ1.a

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.hl.TZ1.a
Level hl Paper 2 Time zone TZ1
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
22M.2.hl.TZ1.a

Ammonia is soluble in water and forms an alkaline solution:

NH3 (g) + H2O (l) ⇌ NH4+ (aq) + HO– (aq)

State the relationship between NH4+ and NH3 in terms of the Brønsted–Lowry theory.

[1]

Markscheme

conjugate «acid and base» ✔

Examiners report

Well done; However, instead of identifying the conjugate acid-base relationship, some simply identified these as Brønsted–Lowry base and acid.

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