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Notes: Heterogeneous Mixtures
H: It’s All Mixed Up
Heterogeneous mixtures
November 20, 2008
Objectives
1. Compare and contrast a solution, suspension and a colloid
2. Describe and give examples of suspensions and colloids
Solutions
• Have dissolved particles
• Do not separate
• Cannot be filtered
• Do not scatter light
The individual components of a mixture are present in
a. similar amounts
b. regular amounts
c. fixed amounts
d. different amounts
Which of the following is a homogeneous mixture?
a. fruit salad
b. shaving cream
c. chocolate chip cookie
d. a bowl of yogurt and fruit
What is considered to be the universal solvent?
Suspensions
A heterogeneous mixture in which particles of the material are dispersed throughout a liquid or gas.
The particles in a suspension are insoluble, so they settle out.
Can be separated by passing them through a filter.
Examples of Suspensions
Snow globes
Muddy water
Salad dressing
Paint
Colloids
A colloid is a mixture that has the properties of both a solution and a suspension.
ColloidsParticles are small but do not dissolve
Mixture can not be separated by passing them through a filter.
Tyndall effect
Colloidal suspensions can scatter rays of light.
How are colloids similar to solutions?
a. Both are mixtures
b. Both contain dissolved solutes
c. Both can be separated
d. Both scatter beams of light
5 types of colloids
Sols
Gels
Aerosols
Foams
Emulsions
Examples of Colloids
Fog
Whipped cream
Milk
Cheese
Blood plasma
Jell-o
The particles in a suspension are _________ than the particles in a colloid.
a. larger
b. smaller
c. more soluble
d. less soluble
If the label on a medicine bottle says "shake well before using", the medicine is probably a
a. solution
b. suspension
c. colloid
d. compound
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