Solutions and Colligative Properties

📋 Course Outline

1. Solutions and their types
2. Concentration terms in solutions
3. Colligative properties of solutions
4. Raoult's law and vapor pressure lowering
5. Elevation of boiling point and depression of freezing point
6. Osmotic pressure and its applications
7. Determination of molecular masses using colligative properties

📖 1. Solutions and their types

🔑 Key Concepts & Definitions

• Solution : A solution is a homogeneous mixture of two or more substances that are uniformly distributed at the molecular level. In such mixtures, the components are so thoroughly combined that they appear as a single phase, with no visible separation or boundaries between the substances.

• Solvent : The component of a solution that is present in the largest amount. It is the medium in which the other substances, known as solutes, are dissolved. The solvent determines the physical state of the solution—liquid, solid, or gas—and influences the solution’s properties.

• Solute : The substance that is dissolved in the solvent to form a solution. It is present in a lesser amount compared to the solvent. The solute's particles disperse uniformly throughout the solvent, contributing to the solution's homogeneous nature.