DP Chemistry (last assessment 2024)
Question 22M.2.hl.TZ1.4a
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.hl.TZ1.4a |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
22M.2.hl.TZ1.4a
Ammonia is soluble in water and forms an alkaline solution:
NH3 (g) + H2O (l) NH4+ (aq) + HO– (aq)
(a)
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.
