Practice Reduction in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The gain of electrons by an atom, ion, or molecule, decreasing its oxidation state.
Grabbing electrons. The charge gets 'reduced' (becomes more negative).
Example 1
easyIn the reaction 2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}, identify which species is reduced.
Example 2
mediumIn a blast furnace, iron ore is reduced: \text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2. Identify the reducing agent.
Example 3
easyIn the reaction \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu}, is copper being oxidized or reduced?
Example 4
mediumIn the reaction \text{CuO} + \text{H}_2 \rightarrow \text{Cu} + \text{H}_2\text{O}, which substance is reduced?