DP Chemistry (last assessment 2024)
Question 21N.2.hl.TZ0.5a
| Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.2.hl.TZ0.5a |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Formulate | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
21N.2.hl.TZ0.5a
Phosphoric acid, H3PO4 can form three different salts depending on the extent of neutralisation by sodium hydroxide.
(a)
Formulate an equation for the reaction of one mole of phosphoric acid with one mole of sodium hydroxide.
[1]
Markscheme
H3PO4 (aq) + NaOH (aq) → NaH2PO4 (aq) + H2O (l) ✔
Accept net ionic equation.
