DP Chemistry (last assessment 2024)
Question 22N.2.sl.TZ0.1b
| Date | November 2022 | Marks available | [Maximum mark: 1] | Reference code | 22N.2.sl.TZ0.1b |
| Level | sl | Paper | 2 | Time zone | TZ0 |
| Command term | Justify, State | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 1]
22N.2.sl.TZ0.1b
Ammonium nitrate, NH4NO3, is used as a high nitrogen fertilizer.
(b)
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
40% of candidates identified the ammonium ion as a Bronsted-Lowry acid with a valid reason. The most common mistake was considering "ammonia" instead of the "ammonium ion".
