DP Chemistry (first assessment 2025)
Question 19M.2.SL.TZ2.4e(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.SL.TZ2.4e(i) |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Suggest | Question number | e(i) | Adapted from | N/A |
e(i).
[Maximum mark: 1]
19M.2.SL.TZ2.4e(i)
(e(i))
Suggest why the existence of salts containing an ion with this formula could be predicted. Refer to section 7 of the data booklet.
[1]
Markscheme
same group as Mn «which forms MnO4-»
OR
in group 7/has 7 valence electrons, so its «highest» oxidation state is +7 [✔]
Examiners report
This should have been a relatively easy question but many candidates sometimes failed to see the connection with Mn or the amount of electrons in its outer shell.
Syllabus sections
Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.6—The oxidation state is a number assigned to an atom to show the number of electrons transferred in forming a bond. It is the charge that atom would have if the compound were composed of ions. Deduce the oxidation states of an atom in an ion or a compound.