DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.3f.i

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.hl.TZ0.3f.i
Level hl Paper 2 Time zone TZ0
Command term Label Question number f.i Adapted from N/A
f.i.
[Maximum mark: 2]
22N.2.hl.TZ0.3f.i

Consider the following reaction:

Cu2+ (aq) + Fe (s) → Fe2+ (aq) + Cu (s)

The diagram shows an unlabelled voltaic cell for the reaction:

Cu2+ (aq) + Fe (s) → Fe2+ (aq) + Cu (s)

(f.i)

Label the diagram with the species from the equation and the direction of electron flow.

[2]

Markscheme

all 4 species correctly labelled ✔

arrow showing electron flow from anode to cathode in the external circuit ✔

 

Accept any soluble salt of copper(II) for Cu2+ and any soluble salt of iron(II) for Fe2+.

Do not apply ECF for M2.

Examiners report

Most students correctly annotated the voltaic cell and usually also marked the correct direction of electron flow. Some however had the electrodes reversed, whilst others displayed a higher level of confusion with ionic species comprising the electrodes.

Syllabus sections