DP Chemistry (first assessment 2025)
Question 19N.2.SL.TZ0.a(iii)
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.2.SL.TZ0.a(iii) |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | State | Question number | a(iii) | Adapted from | N/A |
a(iii).
[Maximum mark: 2]
19N.2.SL.TZ0.a(iii)
The dissociation of citric acid is an endothermic process. State the effect on the hydrogen ion concentration, [H+], and on Ka, of increasing the temperature.
[2]
Markscheme
Syllabus sections
Reactivity 2. How much, how fast and how far? » Reactivity 2.3—How far? The extent of chemical change » Reactivity 2.3.4—Le Châtelier’s principle enables the prediction of the qualitative effects of changes in concentration, temperature and pressure to a system at equilibrium. Apply Le Ch.telier’s principle to predict and explain responses to changes of systems at equilibrium.