Year 11 - Science
Extraction of metals by reduction
Using Earth's resources
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
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.
Lesson Summary
You will learn to explain how carbon can extract some metals from metal oxides by heating.
Key Notes
- Unreactive metals are often found in the earth as pure metal.
- Metals that are less reactive than carbon can be extracted by heating their oxides with carbon.
- A metal oxide is said to be reduced by carbon because the metal oxide loses oxygen.
- Carbon is oxidised when it reacts with a metal oxide because it gains oxygen to form carbon dioxide.
Vocabulary To Learn
- metal oxide: A metal oxide is a compound containing metal and oxygen atoms chemically bonded together.
- oxidation: Oxidation is a type of reaction in which a substance gains oxygen or loses electrons.
- reduction: Reduction is a type of reaction in which a substance loses oxygen or gains electrons.
- ore: An ore is a rock that contains metals or metal compounds. Metal can be extracted from its ore.
- redox reaction: A redox reaction is a reaction where both reduction and oxidation occur.
Common Mistakes To Avoid
- Thinking that oxidation and reduction are only to do with the loss and gain of oxygen.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Unreactive metals are often found in the earth as pure metal. Metals that are less reactive than carbon can be extracted by heating their oxides with carbon.
2. Define this scientific word and use it in context. 'metal oxide'
A metal oxide is a compound containing metal and oxygen atoms chemically bonded together. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Thinking that oxidation and reduction are only to do with the loss and gain of oxygen. Correction: Oxidation is the loss of electrons or the gain of oxygen. Reduction is the gain of electrons or loss of oxygen.
More Lessons In This Unit
- Alternative methods of extracting metals: phytoextraction and bioleaching Study Guide
- Alternative methods of extracting metals: phytomining and bioleaching Study Guide
- Cracking fractions of crude oil Study Guide
- Developing a reactivity series for metals Study Guide
- Earth's resources and sustainable development Study Guide
- Fractional distillation of crude oil Study Guide
- Life cycle assessments (LCAs) Study Guide
- Polymer structures Study Guide
- Redox reactions Study Guide
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