Disperse system Flashcards
1
Q
Colloidal disperse system size
A
1nm-1μm
2
Q
Preparation of colloids
A
-Dispersion method
Breaking down of large molecule
-Condensation method
aggregation of small particle
3
Q
Dispersion method
A
coarse material broken down by
- colloid mill
- ultrasonic tratment
4
Q
Condensation method
A
rapid production of supersaturate solution to produce colloid particle
- chemical reaction
- change in solvent
5
Q
Properties of colloid
A
- Kinetic
- optical
- electrical
6
Q
Kinetic properties of colloid
A
-Thermal motion ~Brownian motion ~Diffusion ~Osmotic pressure/osmosis -Sedimentation -Viscosity
7
Q
Optical properties of colloid
A
-Light scattering
~Tyndall effect
-Ultramicroscope
-Electron microscope
