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In the reaction \(\mathrm{CuO + H_2 \rightarrow Cu + H_2O}\), which correctly identifies the oxidation and reduction?

Answer and explanation

Correct answer: Hydrogen is oxidised and copper(II) oxide is reduced

Hydrogen has oxidation number 0 in \(\mathrm{H_2}\) and +1 in \(\mathrm{H_2O}\), so hydrogen is oxidised. Copper has oxidation number +2 in \(\mathrm{CuO}\) and 0 in \(\mathrm{Cu}\), so copper(II) oxide is reduced. Thus, this is a redox reaction because oxidation and reduction occur together.

Related tags

Redox ReactionOxidationReductionOxidation NumberCopper OxideClass 10 Science

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