What are some examples of colloids?
Milk which is a liquid containing small to medium -sized
particles that are evenly combined and do not settle .
Some examples of man made colloids are butter, jelly, smoke, dust, shaving lather, whipped cream, mayonnaise, cosmetic lotion, pearl and opal. For man made aerosols some examples are aerosol sprays, insecticide spray, and smog.
A colloid is formed when one substance is mixed with another at the microscopic level. There are nine types, depending on the medium of dispersion and the phase of dispersion. A liquid that is dispersed as a gas is an aerosol, such as hair spray. A solid medium in a liquid phase is a gel, such as Jell-O. A solid medium dispersed as gas is a solid foam, such as Styrofoam.
Aerosol (liquid dissolved in a gas - fog, mist, clouds)
Foam (gas dissolved in a liquid - soda (CO2 dissolved in water), whipped cream)
Solid Foam (gas dissolved in a solid - Styrofoam, plaster)
Emulsion (liquid dissolved in a liquid - butter, milk)
Gel (liquid dissolved in a solid - jello, starch solution)
Solid Aerosol (solid dissolved in a gas - smoke, dust)
Sol (solid dissolved in a liquid - blood, ink, paint)
Solid Sol (solid dissolved in a solid - alloy, colored
Here are some good everyday examples of a colloid:
- Whipped Cream
- Muddy Water
- Colored Glass
- Carbonated Drinks
- Hair Spray