INF1 - D. DISPERSIONS, SOLUBILITY, DISSOLUTION-COVERED Flashcards
1
Q
what is a dispersion
A
a system in which particles of one material are dispersed in a continuous phase of another material
2
Q
describe solutions
A
homogeneous
particle size: 0.01-1nm ions or molecules
don’t separate on standing
3
Q
describe colloids
A
heterogeneous
particle size: 1-1000nm large molecules or aggregates
don’t separate on standing
4
Q
describe suspensions
A
heterogeneous
particle size: >1000nm large particles or aggregates
particles sediment
5
Q
to distribute around the body, what type of fluids do drugs need to be transported in
A
aqueous
6
Q
why do many drugs need to have hydrophobic characteristics
A
- to partition across lipid membranes
- bind with receptors in pockets
7
Q
what is dissolution
A
process where a solute in gaseous, liquid, or solid phase dissolves in a solvent to form a solution
