DP Chemistry (last assessment 2024)
Question 18N.1.sl.TZ0.19
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.1.sl.TZ0.19 |
| Level | sl | Paper | 1 | Time zone | TZ0 |
| Command term | Question number | 19 | Adapted from | N/A |
19.
[Maximum mark: 1]
18N.1.sl.TZ0.19
Which two species act as Brønsted–Lowry acids in the reaction?
H2PO4− (aq) + OH− (aq) HPO42− (aq) + H2O (l)
A. HPO42− (aq) and OH− (aq)
B. H2PO4− (aq) and HPO42− (aq)
C. HPO42− (aq) and H2O (l)
D. H2PO4− (aq) and H2O (l)
[1]
Markscheme
D