Two phases separate a mixture
Two phases separate a mixture
Paper chromatography separates substances because each substance interacts differently with two phases. The stationary phase is the chromatography paper, which stays still. The mobile phase is the solvent, a liquid at the bottom of the container that moves upwards through the paper.
Step-by-step lessons on AQA GCSE Chemistry 8.1.3 Chromatography. 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.