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Electrode potentials and electrochemical cells (A-level only)

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Question 3

A student sets up a copper–copper(II) half-cell consisting of a copper electrode immersed in an aqueous solution of copper(II) sulfate:

Cu2+(aq)+2e−⇌Cu(s) \text{Cu}^{2+}(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{Cu}(\text{s}) Cu2+(aq)+2e−⇌Cu(s)

Which of the following changes will not alter the electrode potential of this half-cell?

A

Doubling the mass of the copper electrode

B

Decreasing the concentration of Cu2+(aq)\text{Cu}^{2+}(\text{aq})Cu2+(aq) ions

C

Increasing the temperature of the half-cell

D

Adding concentrated aqueous ammonia to the copper(II) sulfate solution

Markscheme

Electrode potentials and electrochemical cells (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Electrode potentials and electrochemical cells (A-level only)

34 exam-style questions on AQA A Level Chemistry Electrode potentials and electrochemical cells (A-level only), covering Electrode potentials and cells (A-level only) and Commercial applications of electrochemical cells (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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