A solution, as used in chemistry, is defined as a homogeneous mixture of one or more solutes dissolved in a solvent. Both solutes and solvents can exist as a solid, liquid or gas.
In solutions, each substance's molecules are mixed together, but do not form new bonds. Therefore solutions are not the product of a chemical reaction, but a physical change. In a solution, the solute's ability to dissolve in a solvent is known as solubility. Solubility is a quantitative value based on molecular construction, pressure and temperature. Many typical solutions use water as the solvent and are known as aqueous solutions.