Physical Pharmacy L1 - Physical Properties of Solutions PDF

PHYSICAL PHARMACY | L1 - PHYSICAL PROPERTIES OF SOLUTIONS LEC | Sir Albert A. Malabarbas 1ST SEM - MIDTERMS DEFINITION OF TERMS TRUE SOLUTIONS System – considered to be a bounded space or an - a.k.a. molecular dispersions exact q...

PHYSICAL PHARMACY | L1 - PHYSICAL PROPERTIES OF SOLUTIONS LEC | Sir Albert A. Malabarbas 1ST SEM - MIDTERMS DEFINITION OF TERMS TRUE SOLUTIONS System – considered to be a bounded space or an - a.k.a. molecular dispersions exact quantity of material - composed of two substances is known as a binary solution Dispersion – consists of at least two phases with one - components are referred to as the solvent or more dispersed (internal) phases contained in a and solute single continuous (external) phase Phase – defined as a distinct homogeneous part of a system separated by definite boundaries from other parts of the system INTRODUCTION - material substances can be mixed together to form a variety of pharmaceutical mixtures (or dispersions) such as true solutions, colloidal dispersions and coarse dispersions PHYSICAL PROPERTIES OF SUBSTANCES - can be classified as: TRUE SOLUTIONS 1. COLLIGATIVE - a mixture of two or more components that - depend mainly on the number of forms a homogeneous molecular dispersion particles in a solution - a one-phase system (small PS) - examples: Osmotic pressure, Vapor - particle size of 0.9% - hypertonic ISOSMOTIC BUT NOT ISOTONIC 0.9% - isotonic - biological membranes do not always