Choosing the method
Choosing the method
To prepare a pure soluble salt, any excess reactant must be removed or the reactants must be added in exactly the correct amounts. The solution is then concentrated by evaporating some of the water and left to cool so that crystals form.
Step-by-step lessons on Edexcel GCSE Chemistry 4.1.7 Preparing soluble 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.