In chemistry, a solution is a homogeneous mixture of one or more solutes dissolved in a solvent). The solvent is the substance present in the greatest amount, while the solute is the substance that is dissolved. Solutions can have any phase, such as gases dissolved in gases, solids dissolved in solids, and liquids dissolved in solids. The term "aqueous solution" is used when one of the solvents is water).

Solutions are important in many biological, laboratory, and industrial applications of chemistry. They represent equilibrium systems, and quantitative measurements of solutions are a key component of chemistry. The ability of liquids to dissolve other fluids or solids has many practical applications, such as separating and purifying materials, carrying out chemical analysis, and selecting materials for chemical manufacturing equipment. Many chemical reactions occur in solutions and are influenced by the solubilities of the reagents.

In summary, a solution is a homogeneous mixture of one or more solutes dissolved in a solvent, and they play an important role in many areas of chemistry.