In IUPAC definition, colloid is a short synonym for colloidal system,
and colloidal is a state of subdivision such that the molecules or
polymolecular particles dispersed in a medium have at least one dimension
between approximately 1 nm and 1 μm, or that in a system discontinuities are
found at distances of that order.
Types Of Colloid :
|
Dispersion Phase/ ->
Dispersion Medium
|
Gas
|
Liquid
|
Solid
|
|
Gas
|
None
|
Liquid Aerosol
|
Solid Aerosol
|
|
Liquid
|
Foam
|
Emulsion
|
Sol
|
|
Solid
|
Solid Foam
|
Gel
|
Solid-Sol
|
Colloid Characteristics:
1.Tyndall effect,
Tyndall effect is used commercially to determine the size
and density of particles in aerosols and
other colloidal matter
 |
| source : epicphysics.com |
2.Adsorbtion
Adsorption is the adhesion of atoms, ions, or molecules from
a gas, liquid, or dissolved solid to a surface
 |
| source : dictionary.com |
3. Brownian Motion
Brownian motionis the random motion of particles suspended
in a fluid (aliquid or
a gas)
resulting from their collision with the quick atoms or molecules in
the gas or liquid. It makes the colloid cannot gravitate.
 |
| source : perpustakaancyber.blogspot.com |
4.Coagulation
Coagulation is a process which involves coming together of
colloidal particles so as to change into large sized particles which ultimately
settle as a precipitate or float on the surface.
 |
| source : bisakimia.com |
5. Electrophoresis
Electrophoresis is the motion of dispersed particles relative to a
fluid under the influence of a spatially uniform electric
field
 |
| source : majalahkimia.blogspot.com |
6. Dialysis
Dialysis is the separation of colloids from
dissolved ions or molecules of small dimensions, orcrystalloid, in a solution.
 |
| source : catatan.legawa.com |
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