Consult the table of the standard electrode potentials and suggest three substances that can oxidize ferrous ions under suitable conditions.

Explanation

To determine three substances that can oxidize ferrous ions (Fe²⁺) to ferric ions (Fe³⁺), we need to consult the standard electrode potential values. The oxidation of ferrous ions can be represented by the half-reaction:

\[ \text{Fe}^{2+} \rightarrow \text{Fe}^{3+} + e^- \]

The standard reduction potential (E°) for this half-reaction is -0.77 V. To oxidize Fe²⁺, we need substances that have a higher standard reduction potential than -0.77 V, as they will act as stronger oxidizing agents.

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