Oxidation is a type of reaction in which a substance gains oxygen or loses electrons.

Reduction is a type of reaction in which a substance loses oxygen or gains electrons.

A half equation is a chemical equation used to show the electrons lost in oxidation or the electrons gained in reduction.

A redox reaction is a reaction where both reduction and oxidation occur.

Redox reactions

Combined science

Earth's resources and sustainable development

Fractional distillation of crude oil

Cracking fractions of crude oil

Polymer structures

Developing a reactivity series for metals

Extraction of metals by reduction

Alternative methods of extracting metals: phytoextraction and bioleaching

Life cycle assessments (LCAs)

In the Atmosphere and Changing Climate unit, pupils will build on their understanding of Earth's resources to learn about the evidence for the composition and evolution of the Earth's atmosphere and the impact of human activity on climate change.

In the Earth's Resources unit, pupils learned about the composition and structure of the Earth, and the rock cycle.

This unit covers crude oil, its role as a hydrocarbon source, and separation by fractional distillation. It explores cracking, metal reactivity, and extraction methods, including biological alternatives. Emphasis is on recycling, life-cycle assessments, and evaluating decisions.

Using Earth's resources

Which of the following statements are true?

What is the name of a reaction which involves both reduction and oxidation?

Which of the following statements are true for this half equation: Ca → Caᐩ² + 2eᐨ?

Which is the correct half equation for the reduction of Liᐩ?

What do we not include in ionic equations for reactions?

What is the missing product in this overall ionic equation: Cuᐩ² + Al → Alᐩ³ + ___?

an atom or group of atoms with a positive or negative charge

is made up of 2 or more different elements chemically bonded together

Match the definition with the correct key term.

What has been oxidised in this reaction? Zinc oxide + carbon → carbon dioxide + zinc

What has been reduced in this reaction? Iron oxide + magnesium → magnesium oxide + iron.

What key term is used to describe reactions where a more reactive element takes the place of a less reactive element in a compound?

Match the group in the periodic table with the correct charge on their ions.

What is the correct formula and charge of a nitrate ion?

Redox reactions

Lesson outcome