Mixtures of Matter

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Section 3.3

• Mixtures of Matter

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Composition of Matter
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Mixtures

• Combination of two or more pure substances in
  which the pure substances retain their chemical
  properties

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Examples

• Sand and water
• Salt and water

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Types of Mixtures
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Heterogeneous Mixtures

• Does not blend smoothly throughout it
• Individual components remain distinct areas of
  the mixture
• No uniform distribution of components throughout
  the mixture

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Homogeneous Mixture

• Constant composition throughout
• Single phase
• Also referred to as a solution
• Can be solid, liquid, or gas

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Heterogeneous or Homogeneous?
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Heterogeneous or Homogenous?
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Heterogeneous or Homogeneous?
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Heterogeneous or Homogeneous?
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Separating Mixtures

• Reverse of mixing
• Since each component of a mixture retains
  chemical composition
• Chemists developed various separation methods

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Filtration

• Solid from liquid separation
• Uses porous medium
• Example Filter paper

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Filtration Apparatus
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Distillation

• Homogenous mixture separation
• Ability of components to form gases
• Example Salt water ?Salt Pure Water

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Distillation Apparatus
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Crystallization

• Used when a solution contains maximum amount of
  dissolved substance
• Add a little more and pure solid particles are
  produced

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Rock Candy Crystallization
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Chromatography

• Writing of Colors
• Separation by differing abilities of substances
  to adhere to various surface solids
• Paper, starch
• Example ink separation by paper chromatography

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Chromatography Image