DP Chemistry (first assessment 2025)
Question 23M.2.HL.TZ1.2a
| Date | May 2023 | Marks available | [Maximum mark: 2] | Reference code | 23M.2.HL.TZ1.2a |
| Level | HL | Paper | 2 | Time zone | TZ1 |
| Command term | Deduce, Identify | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
23M.2.HL.TZ1.2a
(a)
The results are given where ✓ = reaction occurred and = no reaction.
| Metal | ASO4 (aq) | BSO4 (aq) | CSO4 (aq) | DSO4 (aq) | ESO4 (aq) |
| A | — | ✓ | ✗ | ✓ | ✓ |
| B | ✗ | — | ✗ | ✓ | ✓ |
| C | ✓ | ✓ | — | ✓ | ✓ |
| D | ✗ | ✗ | ✗ | — | ✓ |
| E | ✗ | ✗ | ✗ | ✗ | — |
(a.i)
Identify the oxidation state of metal A in ASO4.
[1]
Markscheme
+2/II ✓
Do not accept A2+, A+2, 2 OR 2+.
(a.ii)
Deduce the activity series of the metals.
[1]
Markscheme
C A B D E ✓
Do not accept reverse order unless the answer makes it clear which is the most reactive.