Mixtures

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Mixtures
Air is a mixture

• 2 or more substances mixed together but not
  chemically combined

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2 types of mixtures(Homogeneous or heterogeneous)

• Heterogeneous
• not well mixed
• does not appear the
• same throughout.
• easily separated by physical means (filtering,
  magnets)
• Examples fruit salad, vegetable soup, Granite

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2) Homogeneous Mixture

• Appears the same throughout
• Is well mixed
• can be separated by physical means
• EX milk, air, suntan lotion, paint, clouds,
  lemonade

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Types of Homogeneous mixtures

• A) solutions
• B) colloids
• C) suspensions

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A) Solutions

• When one substance dissolves in another
• 2 parts solute and a solvent
• solute is the substance that is dissolved
• solvent substance that does the dissolving

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Alloys

• Metal solutions
• EX
• Sterling silver is silver with small amounts of
  Copper dissolved in it
• Stainless Steel is iron and chromium

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B) Colloids

• Colloids are solutions. They can be described as
  a substance trapped inside another substance.
  They can be identified by their characteristic
  scattering of light.
• do not separate on standing
• Mixed together but not dissolved
• EXMilk is a colloid of butter fat globules
  dispersed within a water based liquid

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c) Suspensions

• The size of the particles is great enough so they
  are visible to the naked eye.
• Blood and aerosol sprays are examples of
  suspensions.