What is a base?
What is a base?

A base is a substance that neutralises an acid. Metal oxides, metal hydroxides and metal carbonates are common examples of bases.
Step-by-step lessons on Edexcel GCSE Chemistry 4.1.4 Bases, alkalis and the reactions of acids. 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.