Reduction: GCSE Chemistry Definition

What is reduction?

In GCSE Chemistry, reduction can be defined as:

• the loss of oxygen

• the gain of electrons

For example, in the extraction of iron from iron ore in a blast furnace:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

• Iron(III) oxide is reduced to iron as it loses oxygen.

• The iron ions gain electrons to form iron atoms:

Fe³⁺ + 3e^-→ Fe

Reduction always occurs alongside oxidation in redox reactions, making it a fundamental concept in GCSE Chemistry. Understanding reduction is crucial for topics such as electrolysis, metal extraction, and energy changes in chemical reactions.

Reduction Revision Resources to Ace Your Exams

For more information about reduction check out the following resources:

• Reduction in terms of electrons- Revision notes

• Half equations to represent oxidation- Revision Notes

• Reactivity of metals- Exam questions

• Half equations- Flashcards

Explore our GCSE Chemistry Revision Resources.