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Hydrogen Ions and the pH Scale

Hydrogen Ions and the pH Scale

pH scale from 0 to 14 showing indicator colours and the corresponding hydrogen ion and hydroxide ion concentrations

pH is a number, usually from 0 to 14, that describes how acidic or alkaline a solution is. A solution is acidic below pH 7, neutral at pH 7, and alkaline above pH 7.

3.3.6 Hydrogen ion concentration and pH Lesson

  1. GCSE
  2. /Chemistry
  3. /3.3.6 Hydrogen ion concentration and pH

Step-by-step lessons on OCR GCSE Chemistry 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.

Lessons