It is published by Britannica. Core Concepts Matter occupies space and has substance with observable properties. Mixtures are a combination of two or more materials which retain their individual properties and can be separated by physical means. A solution is a special kind of mixture which cannot be separated by filtration but may be separated by evaporation or some other physical means. A saturated solution is one in which no more of the solid material can be dissolved.
Solubility is the property that substances have of dissolving in solvents.
Solubility is different for different materials and can change with temperature and different solvents. A solution is saturated when as much solid material as possible has dissolved in the liquid. Concentration expresses a relationship between the amount of dissolved materials and the volumn of solvent. When a change occurs as a result of mixing two or more materials, that change is a chemical reaction. A reaction results in new materials.