In lemonade, water is the solvent, while sugar and lemon juice are solutes. A solvent is a liquid that dissolves a solute, which is matter that dissolves in a solvent. When lemon juice and sugar are mixed with water, they dissolve and form a solution, which is a mixture in which the different kinds of matter are spread out evenly. Once the solution is completely mixed, it is the same throughout, and the amounts of sugar, water, and lemon juice are the same everywhere in the glass or pitcher. The mixture does not separate if it is left standing or poured through a strainer.