What is the definition of a solution?

A solution is defined as a homogeneous mixture of two or more substances. This means that the components of a solution are uniformly distributed at the molecular level, resulting in a consistent composition throughout. In a solution, the solute (the substance that is dissolved) is evenly spread out within the solvent (the substance that does the dissolving), making it appear as a single phase. An everyday example of a solution is saltwater, where the salt is evenly distributed within the water.

The concept of homogeneity is crucial in defining solutions, as it distinguishes them from other mixtures where the components may not be uniformly mixed. Understanding this definition helps to clarify various scientific principles, including solubility, concentration, and the behavior of solutions in chemical reactions.