DP Chemistry (last assessment 2024)

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

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.2.hl.TZ0.3f.v
Level hl Paper 2 Time zone TZ0
Command term Calculate Question number f.v Adapted from N/A
f.v.
[Maximum mark: 1]
22N.2.hl.TZ0.3f.v

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.v)

Calculate the standard cell potential, in V, for this cell. Use section 24 of the data booklet.

[1]

Markscheme

«E⦵ = + 0.34 V – (–0.45 V) = +» 0.79 «V» ✔

Examiners report

About two thirds of the students correctly identified the electrode potentials and combined these to deduce the cell potential, though a number used Fe3+/Fe2+ rather than Fe2+/Fe.

Syllabus sections