This document provides information about homogeneous mixtures known as solutions. It discusses key concepts such as solute, solvent, and solvation process. Factors that affect solubility like nature of solute and solvent, temperature, and pressure are outlined. Solutions are classified based on concentration and electrical conductivity. Common concentration units like molarity, normality, and molality are defined. Operations involving single and multiple solutions like dilution, mixing, and chemical reactions are also described. The document is presented by Julio Rojas, an experienced physics teacher, for a basic semester course.