Classification of
Matter
Basic Classification of Matter
Adding More Detail to the
Basic Classification Scheme
FOAM: a substance that is formed by trapping many gas
bubbles in a liquid or solid.
COLLOID: a type of mixture in which one substance is
dispersed evenly throughout another
EMULSION: a type of colloid made from two or more
immiscible (mix without blending) liquids.
Classification of Colloids
Medium / Phases
Gas
Continuous
Liquid
medium
Solid
Dispersed phase
Gas
Liquid
Solid
NONE
Liquid aerosol
Solid aerosol
(All gases are mutually miscible)
Examples: fog, mist, hair
sprays
Examples: smoke, cloud,
air particulates
Foam
Emulsion
Sol
Example: whipped cream, shaving Examples: milk,
cream
mayonnaise, hand cream
Solid foam
Gel
Examples: aerogel, styrofoam,
pumice
Examples: agar, gelatin,
jelly, silicagel, opal
Examples: pigmented
ink, blood, paint
Solid sol
Example: cranberry glass
– gold dispersed in glass
DEMONSTRATIONS
Little Miss Muffet, sat on a tuffet,
Eating her curds and whey;
Along came a spider, who sat down beside her
And frightened Miss Muffet away.
Cottage Cheese (Curds and Whey)
Whipped Cream
Butter
Polyurethane
EXPERIMENT
MAKING CHOCOLATE MOUSSE
STEPS
MATERIALS
1. Everyone needs to wash their hands
1 plastic table cover
1 stainless steel bowl
1 wire whisk
1 measuring cup
2 bars chocolate
1 bottle water
1 pair of gloves
1 hot plate
1 ice bath
2. Cover the work area with the plastic table cover
3. Choose one group member to handle the chocolate – this
person should put on the gloves
4. Break the chocolate into small pieces into the bowl
5. Add ½ cup water
6. Place the bowl on the hot plate and stir until all the
chocolate is melted and blended with the water
7. Remove from heat, place on ice and take turns vigorously
whisking the mixture until a stable foam is formed
8. Sample and taste if you wish