CAIE IGCSE Chemistry 6.4.11 An oxidising agent as a substance that

Practise deciding which substance is the oxidising agent by tracking electron gain, reduction and the substance it oxidises.

Exam points

[Maximum number: 2]

When magnesium is added to aqueous copper(II) sulfate a reaction occurs. The ionic equation for the reaction is shown.

\mathrm{Mg}+\mathrm{Cu}^{2+} \rightarrow \mathrm{Mg}^{2+}+\mathrm{Cu}

Identify the oxidising agent in this reaction. Give a reason for your answer.

$\mathrm{Cu}^{2+}$ OR copper(II) ions OR copper ions

gains electrons

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