Insoluble - GCSE Chemistry Definition

Insoluble is a term used in chemistry to describe a substance that cannot dissolve in a particular solvent. When a substance is insoluble, no matter how much you mix it, it will not form a solution with the liquid. For example, if you add sand to water and stir, the sand will not dissolve; it will simply settle at the bottom. This is because sand is insoluble in water. Understanding whether a substance is soluble or insoluble helps in predicting how it will behave when mixed with different liquids. In your GCSE Chemistry course, you might explore various substances to see which are soluble or insoluble in water and other solvents.