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Question 18N.3.hl.TZ0.21c

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.hl.TZ0.21c
Level hl Paper 3 Time zone TZ0
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 2]
18N.3.hl.TZ0.21c

Taxol is a chiral cancer drug which is synthesized using a chiral auxiliary.

(c)

Explain the process of solvent extraction by which Taxol is isolated.

[2]

Markscheme

Any two of:

immiscible solvents ✔

partitioning of Taxol between the two solvents

Taxol more soluble in one solvent ✔

extraction carried out multiple times «to improve extraction» ✔

shaking/stirring the mixture ✔

separating the two layers ✔

evaporation of the solvent from the final solution «to obtain pure Taxol» ✔

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