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Solutions2011

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  • 1. Mixtures and Solutions!!! :) Divide your paper for cornell notes ( you know the notes with two columns?)
  • 2. Questions:
    • Are all solutions permanent?
    • Are there different types of solutions? If so, what are they?
    • What is the difference between a homogenous mixture and a heterogeneous one?
  • 3. Heterogeneous Mixtures
    • What is a heterogeneous mixture?
    • A heterogeneous mixture does not have a fixed composition.
      • The amount of each substance in different samples varies.
        • fruit salad
        • dirt
        • granite
    • There are different types of Heterogenous mixtures
      • Suspensions
      • Colloids
      • Emulsions
  • 4.
    • Particles in a suspension are large and settle out.
    • (Ex: any drinks you have to shake up)
      • Natural orange juice contains particles of pulp.
    • Particles in a suspension may settle over time.
    • Particles in a suspension may be filtered out.
  • 5. Suspension
  • 6.
    • Some mixtures of two liquids will separate.
      • Oil and vinegar in salad dressing separate into two layers.
    • Liquids that do not mix with each other are immiscible.
  • 7. Colloids
    • Other familiar materials are colloids.
      • gelatin desserts, egg whites, and blood plasma
  • 8.
      • Does particle size have any bearing on what type of solution we will have?
      • Yes or no? (Use your clickers)
    Determines what type of solution it will be. Smaller the particle, the less it will settle out.
  • 9.
    • Some immiscible liquids can form colloids.
    • (Reminder: Immiscible means that it does not mix)
      • emulsion: any mixture of two or more immiscible liquids in which one liquid is dispersed in the other
      • Examples: Cream, mayonaise, some dressings
  • 10. Emulsions
  • 11. Question
    • A good example of a heterogeneous mixture would be….
    • Suspensions occur when……
    • Write down your answers and questions in your notes:
  • 12. Homogeneous Mixtures
    • A homogeneous mixture looks uniform even when you examine it under a microscope because the individual components of the mixture are too small to be seen.
    • Homogenous mixtures are solutions.
    • The smallest particles of one substance are evenly spread among similar particles of another. (definition of solution)
  • 13.
    • solute: in a solution, the substance that dissolves in the solvent
      • Is dissolved
        • Salt
    • solvent: in a solution, the substance in which the solute dissolves
      • Dissolver
        • Water
  • 14. Homogeneous Mixture
  • 15. Homogeneous Mixtures, continued
    • Miscible liquids mix to form solutions.
      • miscible: liquids that form a single layer when mixed
  • 16. Interesting: Don’t copy!!!!
      • distillation: a method used to separate miscible liquids that have different boiling points
    • Liquid solutions sometimes contain no water.
      • petroleum: a liquid solution of gasoline, diesel fuel, and kerosene
  • 17. Homogeneous Mixtures, continued
    • Other states of matter can also form solutions.
      • The air is a solution of nitrogen, oxygen, argon, and other gases.
      • amalgam : a solution of mercury dissolved in silver
    • The substance that does the dissolving is the solvent
    • Solids can dissolve in other solids.
      • alloy: a solid or liquid mixture of two or more metals
  • 18.
    • Question (use your clickers)
    • Are solutions permanent? (yes or no)
    • Heterogeneous solutions have particles evenly distributed.
    • An example of a homogeneous mixture would be fruit salad?
    • Solutions or homogenous mixtures are always liquid.
    • Can we see the size of the particles in a solution?