DP Chemistry (last assessment 2024)
Question 18M.2.sl.TZ2.7b.ii
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.sl.TZ2.7b.ii |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Outline | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
18M.2.sl.TZ2.7b.ii
The structure of an organic molecule can help predict the type of reaction it can undergo.
(b.ii)
The aldehyde can be further oxidized to a carboxylic acid.
Outline how the experimental procedures differ for the synthesis of the aldehyde and the carboxylic acid.
[2]
Markscheme
Aldehyde:
by distillation «removed from reaction mixture as soon as formed»
Carboxylic acid:
«heat mixture under» reflux «to achieve complete oxidation to –COOH»
Accept clear diagrams or descriptions of the processes.
[2 marks]