impure substances mixtures like bore water

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impure substances(mixtures like bore water)

• Suspensions
• Solutions

- Held together by physical means - not
chemically altered.
Experiment solutions of salt water or
sugar water
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Solutions

• homogeneous mixture
• (particles evenly distributed)

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Some common solutions

• alcohol and water
• salt in water
• sugar in water
• soft drink

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Solutions

• transparent - so you can see through them. They
  may have "colour" but will still be transparent.
• do not separate on standing.
• have particles so small they cannot be separated
  by normal filtration.

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• Solvent the dissolving part of the solution
  (eg. water).
• Solute The dissolved part of the solution is
  called the solute (eg. salt or sugar)
• Solution A solution is a homogeneous mixture of
  solvent and solute particles the size of ions,
  atoms, molecules.

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Not only solids in liquids!

• gas in gas air ( N2, O2 , Ar, CO2 , other gases)
• gas in liquid soft drink (CO2 in water)
• liquid in liquid petrol (mix of hydrocarbon
  compounds)
• solid in liquid sea water (and other salts in
  water)
• gas in solid H2 in platinum or palladium
• liquid in solid dental amalgams ( mercury in
  silver)
• solid in solid alloys ( brass, (Cu/Zn), solder
  (Sn/Pb)

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Suspension

• A suspension is a heterogeneous
• mixture in which the solute particles are larger
  than molecules or ions

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Suspension

• Particles big enough to be seen by the naked eye.
  
• Suspensions are "murky" or "opaque".
• Separate on standing.
• Can be separated by filtration.

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Examples of suspensions

• Blood
• Sand in water
• Soil in water
• Chalk in water
• Tomato juice

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When two liquids totally mix they are called
miscible.

• When two liquids dont mix totally they are
  immiscible.

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Emulsion
A suspension consisting of two liquids that do
not mix.

• Milk (non-homogenised)
• Oil in vinegar (french dressing)
• Oil in water (Italian dressing)