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Oxidation and reduction: follow the oxygen

Oxidation and reduction: follow the oxygen

Oxidation is the gain of oxygen by a substance, and reduction is the loss of oxygen. A redox reaction is a reaction in which one substance is oxidised while another is reduced.

3.3 Types of chemical reactions Lesson

  1. GCSE
  2. /Chemistry
  3. /3.3 Types of chemical reactions

Step-by-step lessons on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

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