DP Chemistry (last assessment 2024)

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Question 19N.3.sl.TZ0.10c

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.sl.TZ0.10c
Level sl Paper 3 Time zone TZ0
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 2]
19N.3.sl.TZ0.10c

Vitamins are organic compounds essential in small amounts.

(c)

Explain why maltose, C12H22O11, is soluble in water.

[2]

Markscheme

«solubility depends on forming many» H-bonds with water ✔
maltose has many hydroxyl/OH/oxygen atom/O «and forms many H-bonds» ✔

NOTE: Reference to “with water” required.
Accept “hydroxy” for “hydroxyl” but not “hydroxide/OH–”.
Reference to many/several OH groups/O atoms required for M2.

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