DP Chemistry (last assessment 2024)

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Question 19M.1.sl.TZ2.23

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.sl.TZ2.23
Level sl Paper 1 Time zone TZ2
Command term Question number 23 Adapted from N/A
23.
[Maximum mark: 1]
19M.1.sl.TZ2.23

The following reaction occurs in a voltaic (galvanic) cell.

Mg (s) + 2Ag+ (aq) → Mg2+ (aq) + 2Ag (s)

Which reaction takes place at each electrode?

[1]

Markscheme

C

Examiners report

The question about electrode reactions discriminated well between high scoring and low scoring candidates. 70 % of the candidates selected the correct electrode reactions given the cell reaction. The most commonly chosen distractor had the same reactions at the opposite electrodes.

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