DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.b

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.hl.TZ0.b
Level hl Paper 2 Time zone TZ0
Command term Justify, State Question number b Adapted from N/A
b.
[Maximum mark: 1]
22N.2.hl.TZ0.b

Ammonium nitrate, NH4NO3, is used as a high nitrogen fertilizer.

State, with a reason, whether the ammonium ion is a Brønsted-Lowry acid or base.

[1]

Markscheme

«Brønsted-Lowry» acid AND can donate a proton/H+

OR

«Brønsted-Lowry» acid AND cannot accept proton/H+ ✔

Examiners report

Not quite as well done as the previous and next questions, but it was unusual to find candidates who did not know the ammonium ion is a Brønsted-Lowry acid because it donates protons, though a handful seemed confused as to whether acids or bases donate protons.

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