DP Chemistry (last assessment 2024)
Question 18N.3.sl.TZ0.14c
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.sl.TZ0.14c |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | Suggest | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
18N.3.sl.TZ0.14c
Buffer systems control pH in the body.
(c)
Suggest a technique for measuring the percentage mass of calcium carbonate in this type of antacid tablet.
[1]
Markscheme
«back» titration
OR
thermal decomposition
OR
atomic absorption/AA ✔
Accept “gravimetric analysis”.
Do not accept description of a technique without proper term given for the technique.
