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, depending on the substances involved. The concentration of a solution refers to the amount of solute present in a given volume of solvent. This can be expressed in different ways, such as molarity, which measures moles of solute per liter of solution. Understanding chemical solutions is essential in fields like chemistry, biology, and pharmacy.