Solubility and salts
Solubility and salts
Solubility measures how much of a substance dissolves in a given amount of solvent. A salt is formed when the hydrogen ion of an acid is replaced by a metal ion or an ammonium ion.
Step-by-step lessons on Edexcel GCSE Chemistry 4.1.8 Solubility rules and preparing insoluble salts. 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.