INF1 - D. DISPERSIONS, SOLUBILITY, DISSOLUTION-COVERED Flashcards
what is a dispersion
a system in which particles of one material are dispersed in a continuous phase of another material
describe solutions
homogeneous
particle size: 0.01-1nm ions or molecules
don’t separate on standing
describe colloids
heterogeneous
particle size: 1-1000nm large molecules or aggregates
don’t separate on standing
describe suspensions
heterogeneous
particle size: >1000nm large particles or aggregates
particles sediment
to distribute around the body, what type of fluids do drugs need to be transported in
aqueous
why do many drugs need to have hydrophobic characteristics
- to partition across lipid membranes
- bind with receptors in pockets
what is dissolution
process where a solute in gaseous, liquid, or solid phase dissolves in a solvent to form a solution