DP Chemistry (last assessment 2024)

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Question 19M.3.hl.TZ1.b(i)

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.hl.TZ1.b(i)
Level hl Paper 3 Time zone TZ1
Command term Deduce Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 2]
19M.3.hl.TZ1.b(i)

Aspirin can be obtained from salicylic acid.

Additional information can be obtained from the 1H NMR spectrum of aspirin.

Deduce the protons responsible for signals X and Y by marking them on the structure of aspirin in (a). Use section 27 of the data booklet.

[2]

Markscheme

correct X   [✔]
correct Y   [✔]

 

Note: X and Y must be near the Hs.

Examiners report

There was considerable confusion with indicating protons responsible for 1H NMR signals. Often entire functional groups were circled or carbon atoms and not hydrogen atoms were circled.

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