DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.3b(ii)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ1.3b(ii) |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Suggest | Question number | b(ii) | Adapted from | N/A |
b(ii).
[Maximum mark: 1]
19M.3.sl.TZ1.3b(ii)
Lithium has many uses.
The emission spectra obtained by ICP-OES for a mixture containing the isotope 6Li (Li-6) and naturally occurring lithium (Li (N)) is shown.
(b(ii))
Suggest a better method.
[1]
Markscheme
ICP-MS [✔]
Note: Accept “MS/mass spectrometry”.
Examiners report
Again relatively few students were able to suggest ICP-MS as a more appropriate alternative.
