DP Chemistry (last assessment 2024)
Question 22M.2.hl.TZ1.d(ii)
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.hl.TZ1.d(ii) |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Outline | Question number | d(ii) | Adapted from | N/A |
d(ii).
[Maximum mark: 2]
22M.2.hl.TZ1.d(ii)
Organomagnesium compounds can react with carbonyl compounds. One overall equation is:
Iodomethane is used to prepare CH3Mg. It can also be converted into methanol:
CH3 + HO– → CH3OH + –
Outline the requirements for a collision between reactants to yield products.
[2]
Markscheme
energy/E ≥ activation energy/Ea ✔
correct orientation «of reacting particles»
OR
correct geometry «of reacting particles» ✔
Examiners report
Good performance. For the requirements for a collision between reactants to yield products, some suggested necessary, sufficient or enough energy or even enough activation energy instead of energy/E ≥ activation energy/Ea.
