Types%20of%20Mixtures

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Types of Mixtures
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Solutions

• Solutions are homogeneous mixtures made up of two
  components.
• The part of the solution that does the dissolving
  is called the solvent.
• The part of the solution that gets dissolved is
  called the solute.
• In a sugar water solution, what is the solute?
• Sugar
• In a sugar water solution, what is the solvent?
• Water

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Solutions (continued)

• The solute particles are lt 1 nm in diameter.
• How large are these particles in cm?
• 0.0000001 cm
• As a result, solutions often appear clear.
• Due to the extremely small particle size
  solutions remain mixed and do not separate
  (settle out) upon standing.
• Solutions cannot be separated by filtration
  (particles are so small they pass through the
  paper with the solvent.
• Examples include kool-aid, flat soft drink

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Solutions
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Colloids

• Colloids are heterogeneous mixtures.
• The particles mixed into the main component are
  between 1 and 100 nm in diameter.
• Due to the slightly larger particle size,
  colloids appear cloudy.
• Although the particles are larger than in a
  solution, they are still small enough that they
  stay mixed and do not separate upon standing and
  cannot be separated by filtration.
• Examples milk, whipped cream

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Colloids
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Tyndall Effect

• Particles in a colloid are large enough that they
  will reflect (scatter) light.
• This phenomenon is referred to as the Tyndall
  Effect.

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Tyndall Effect
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Suspensions

• Suspensions are also heterogeneous mixtures.
• The particles in a suspension are the largest and
  have a diameter gt 100 nm.
• Due to the larger size these particles will
  separate (settle out) upon standing.
• If all of the particles have separated, the
  liquid may appear clear. If not, the liquid may
  appear cloudy.

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Suspensions

• The larger particle size allows for suspensions
  to be separated by filtration.
• The Tyndall effect may be observed if the
  particles have not settled out.
• Examples muddy water, Italian salad dressing.

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Suspension
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Solution, Colloid, or Suspension

• Recently opened soft drink
• Fog
• Food coloring in water
• Blood
• Milk
• Pure air
• Sugar water
• Paint

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