Examples of solutions include water vapor in air, table sugar in water, steel, brass, hydrogen dissolved to palladium, carbon dioxide in water and ethanol in water. A solution is a homogeneous mixture of one substance dissolved in another.
The molecules of a solution are evenly distributed throughout the solution. Solutions must have a solute and a solvent. The solute is the substance being dissolved. The solvent is the substance doing the dissolving. There is usually more solvent than solute in any given solution. The term "solution" is used to describe homogeneous mixtures with small particles. The term "colloids" is used to describe solutions with bigger particles. Colloids are usually foggy in appearance.