DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ2.31

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ2.31
Level hl Paper 1 Time zone TZ2
Command term Determine Question number 31 Adapted from N/A
31.
[Maximum mark: 1]
22M.1.hl.TZ2.31

What is the order of increasing mass deposited by this electrolytic cell?

Ar  Ag = 108,  Cu = 64,  Sb = 122

A.  Ag < Cu < Sb

B.  Sb < Ag < Cu

C.  Cu < Ag < Sb

D.  Cu < Sb < Ag

[1]

Markscheme

D

Examiners report

A rather challenging question. Only 30% of the candidates were able to deduce the relative masses of metals deposited in three electrolytic cells in series. Candidates had to take into account the charge of the metal ions and the molar masses of the metals therefore it was a time-consuming question. The most commonly chosen distractor, C, only took the molar masses into account.

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