DP Chemistry (last assessment 2024)
Question 21M.2.hl.TZ1.5e(i)
| Date | May 2021 | Marks available | [Maximum mark: 3] | Reference code | 21M.2.hl.TZ1.5e(i) |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Sketch | Question number | e(i) | Adapted from | N/A |
e(i).
[Maximum mark: 3]
21M.2.hl.TZ1.5e(i)
Ethanol is obtained by the hydration of ethene, C2H4.
Alternative synthetic routes exist to produce alcohols.
(e(i))
Sketch the mechanism for the reaction of propene with hydrogen bromide using curly arrows.
[3]
Markscheme
curly arrow going from C=C to H of HBr AND curly arrow showing Br leaving ✔
representation of carbocation ✔
curly arrow going from lone pair/negative charge on Br− to C+ ✔
Award [2 max] for mechanism producing 1-brompropane.
