Solutions2011

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Solutions2011

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

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