DP Chemistry (last assessment 2024)

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Question 19M.1.sl.TZ2.22

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.sl.TZ2.22
Level sl Paper 1 Time zone TZ2
Command term Question number 22 Adapted from N/A
22.
[Maximum mark: 1]
19M.1.sl.TZ2.22

Consider the following electrochemical cell.

What happens to the ions in the salt bridge when a current flows?

A. Na+ ions flow to the zinc half-cell and SO42− ions flow to the copper half-cell.

B. Na+ ions flow to the copper half-cell and SO42− ions flow to the zinc half-cell.

C. Na+ and SO42− ions flow to the copper half-cell.

D. Na+ and SO42− ions flow to the zinc half-cell.

[1]

Markscheme

B

Examiners report

A challenging question about direction of ion flow in a salt bridge. 60 % answered correctly and the option with the opposite directions of flow of ions (A) was the most commonly chosen distractor.

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