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    Solutions2011 Solutions2011 Presentation Transcript

    • Mixtures and Solutions!!! :) Divide your paper for cornell notes ( you know the notes with two columns?)
    • 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?
    • 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
      • 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.
    • Suspension
      • 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.
    • Colloids
      • Other familiar materials are colloids.
        • gelatin desserts, egg whites, and blood plasma
        • 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.
      • 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
    • Emulsions
    • Question
      • A good example of a heterogeneous mixture would be….
      • Suspensions occur when……
      • Write down your answers and questions in your notes:
    • 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)
      • 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
    • Homogeneous Mixture
    • Homogeneous Mixtures, continued
      • Miscible liquids mix to form solutions.
        • miscible: liquids that form a single layer when mixed
    • 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
    • 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
      • 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?