Year 11 - Science
Redox reactions
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 write half-equations and balanced ionic equations.
Key Notes
- Oxidation is the loss of electrons and reduction is the gain of electrons.
- Half equations can be written to show which species are oxidised and which are reduced.
- Ionic equations can be written for displacement reactions.
Vocabulary To Learn
- 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.
- half equation: A half equation is a chemical equation used to show the electrons lost in oxidation or the electrons gained in reduction.
- redox reaction: A redox reaction is a reaction where both reduction and oxidation occur.
Common Mistakes To Avoid
- To show the spectator ions in an ionic equation.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
Oxidation is the loss of electrons and reduction is the gain of electrons. Half equations can be written to show which species are oxidised and which are reduced.
2. Define this scientific word and use it in context. 'oxidation'
Oxidation is a type of reaction in which a substance gains oxygen or loses electrons. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: To show the spectator ions in an ionic equation. Correction: Spectator ions are ions that remain the same throughout a reaction. They are not included in the ionic equation.
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
- Extraction of metals by reduction Study Guide
- Fractional distillation of crude oil Study Guide
- Life cycle assessments (LCAs) Study Guide
- Polymer structures Study Guide
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