7th grade ch. 3 sec. 1 working with solutions

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7th grade ch. 3 sec. 1 working with solutions

  1. 1. <ul><li>Ch. 3 Sec. 1 </li></ul><ul><li>Understanding Solutions </li></ul>
  2. 2. solution <ul><ul><li>well mixed mixture </li></ul></ul><ul><ul><li>when one compound is dissolved into another </li></ul></ul>
  3. 3. solvent <ul><ul><li>compound that is present in the larger amount </li></ul></ul>
  4. 4. solute <ul><li>present in smaller amount </li></ul>
  5. 7. colloid <ul><li>mixture containing small, undissolved particles that do not settle out </li></ul>
  6. 8. <ul><li>In other words, a suspension is a liquid with particles floating in it. </li></ul><ul><li>mixture of solid & liquid </li></ul><ul><ul><li>solid will not dissolve in liquid </li></ul></ul>
  7. 9. Example of a solute & solvent <ul><li>Everybody knows that salt dissolves in water. How else would we have salty seawater? </li></ul><ul><li>If you dissolve a teaspoon of table salt in a glass of water —- and then leave the water in the sun for a few days —- the water (or solvent ) will evaporate, leaving behind the solute (the salt ). </li></ul>
  8. 10. Ionic solutions in compound <ul><li>Conduct electricity </li></ul><ul><li>Form ions in water </li></ul>
  9. 11. Molecular solids in solution <ul><li>do not form ions </li></ul><ul><li>dissolve into separate molecules </li></ul>
  10. 12. Effects of solutes on solutions <ul><li>lower freezing point of solvent </li></ul><ul><li>raise boiling point of solvent </li></ul>
  11. 13. Solutions, colloids, & suspensions activity Jello + water Pepper + water Salt + water Solution, colloid, or suspension Appearance-description Substances
  12. 14. United Streaming-Mixtures & Solutions video quiz <ul><li>A ___mixture is not well mixed. </li></ul><ul><li>A ___mixture is the same throughout. </li></ul><ul><li>In a colloid, the particles are ______. </li></ul><ul><li>Muddy river water is an example of a ______. </li></ul><ul><li>In a solution the particles are ______ </li></ul>
  13. 15. <ul><li>The ____________ is part of the solution that does the dissolving. </li></ul><ul><li>________ is often called the universal solvent. </li></ul><ul><li>The _________is part of the solution that is dissolved. </li></ul><ul><li>______ particles tend to dissolve faster than larger ones. </li></ul><ul><li>An ______ is a metal made of 2 or more solids. </li></ul>

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