DP Chemistry (last assessment 2024)

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Question 19N.2.hl.TZ0.6f(iv)

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.2.hl.TZ0.6f(iv)
Level hl Paper 2 Time zone TZ0
Command term Examine Question number f(iv) Adapted from N/A
f(iv).
[Maximum mark: 2]
19N.2.hl.TZ0.6f(iv)

Copper forms two chlorides, copper(I) chloride and copper(II) chloride.

Dilute copper(II) chloride solution is light blue, while copper(I) chloride solution is colourless.

(f(iv))

Examine the relationship between the Brønsted–Lowry and Lewis definitions of a base, referring to the ligands in the complex ion [CuCl4]2−.

[2]

Markscheme

Any two of:
ligand/chloride ion Lewis base AND donates e-pair ✔
not Brønsted–Lowry base AND does not accept proton/H+ ✔
Lewis definition extends/broader than Brønsted–Lowry definition ✔

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