Practice Oxidation in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The loss of electrons by an atom, ion, or molecule during a chemical reaction, resulting in an increase in its oxidation state. Oxidation always occurs simultaneously with reduction in a redox pair.

Giving away electrons. Originally meant 'gaining oxygen' but it's broader.

Example 1

easy
In the reaction 2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}, identify which species is oxidized.

Example 2

medium
In the reaction \text{Zn} + \text{Cu}^{2+} \rightarrow \text{Zn}^{2+} + \text{Cu}, write the oxidation and reduction half-reactions.

Example 3

easy
Is iron rusting an example of oxidation? Explain.

Example 4

medium
In the reaction \text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O}, which substance is oxidized?
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