A chemical solution is a homogeneous mixture where one substance, called the solute, is dissolved in another substance, known as the solvent. Common examples include saltwater, where table salt is the solute and water is the solvent. Solutions can exist in various states, including liquids, gases, and solids. The concentration of a solution refers to the amount of solute present in a given volume of solvent. Solutions can be classified as dilute, where there is a small amount of solute, or concentrated, where there is a large amount. Understanding solutions is essential in fields like chemistry, biology, and pharmacy.