DP Chemistry (last assessment 2024)
Question 22N.2.sl.TZ0.1d
| Date | November 2022 | Marks available | [Maximum mark: 1] | Reference code | 22N.2.sl.TZ0.1d |
| Level | sl | Paper | 2 | Time zone | TZ0 |
| Command term | Calculate | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 1]
22N.2.sl.TZ0.1d
Ammonium nitrate, NH4NO3, is used as a high nitrogen fertilizer.
(d)
Calculate the pH of an ammonium nitrate solution with [H3O+] = 1.07 × 10−5 mol dm−3. Use section 1 of the data booklet.
[1]
Markscheme
«pH = –log (1.07 × 10−5) =» 4.97 ✔
Examiners report
A very well answered question. The majority of candidates calculated the pH using the given [H3O+].
