What constitutes a solution in chemical terms?

In chemical terms, a solution is defined as a homogeneous mixture formed when a substance known as a solute is dissolved in another substance, called a solvent. This combination creates a solution where the solute particles are evenly distributed throughout the solvent. For example, when salt (the solute) is mixed with water (the solvent), it dissolves to form a saline solution, which is uniform in composition.

The concept of a solution emphasizes its uniformity at the molecular or ion level, distinguishing it from other mixtures that may not have such a consistent makeup. Thus, the combination of a solvent and a solute is foundational to the definition of a solution, making it an essential concept in chemistry and relevant fields such as hemodialysis, where understanding solutions is crucial for the preparation and use of dialysate.