DP Chemistry (last assessment 2024)

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Question 19M.3.hl.TZ2.c

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.hl.TZ2.c
Level hl Paper 3 Time zone TZ2
Command term State Question number c Adapted from N/A
c.
[Maximum mark: 1]
19M.3.hl.TZ2.c

Heavy metals are toxic even in very low concentrations.

State a method, other than precipitation, of removing heavy metal ions from solution.

[1]

Markscheme

Any one of:
chelation «by EDTA/polydentate ligand anchored»  [✔]

ion exchange systems [✔]

adsorption by «water» plants  [✔]

 

Note: Accept “use of zeolites”.

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This was not well answered by most of the candidates.

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