Chapter 6 3

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Chapter 6 3

  1. 1. Water and Solutions
  2. 2. Polar Molecules- molecules that have an unequal distribution of charges. Ex: Water The oxygen end is slightly negative while the hydrogen end is slightly positive. Hydrogen bond- weak interaction between hydrogen atom and a fluorine, oxygen or nitrogen atom. It is a type of van der Waals force.
  3. 3. Mixture <ul><li>Mixture - material that is made up of 2 or more substances that can be separated physically. </li></ul>
  4. 4. Heterogeneous Mixtures <ul><li>Heterogeneous Mixture- mixture that is unevenly mixed. </li></ul><ul><li>You can see the stuff in the mixture. </li></ul>
  5. 5. Heterogeneous Mixture Ex:
  6. 6. Homogeneous Mixture <ul><li>Homogeneous Mixture- mixture that is evenly (uniformly) mixed. </li></ul><ul><li>Homogeneous Mixtures are also called solutions . </li></ul>
  7. 7. Homogeneous Mixture Ex:
  8. 8. <ul><li>Acid- a substance that produces hydrogen ions (H + ) in a water solution. </li></ul><ul><li>Taste sour </li></ul><ul><li>Corrosive </li></ul>
  9. 9. <ul><li>Litmus paper in acids will turn/stay red. </li></ul><ul><li>When an acid dissolves in water, H + ions interact with water molecules to form hydronium ions H 3 0 + </li></ul>
  10. 10. <ul><li>Base - a substance that forms hydroxide ions (OH - ) in water. </li></ul><ul><li>Opposite of acids. </li></ul><ul><li>Solids </li></ul><ul><li>Feel slippery </li></ul><ul><li>Bitter </li></ul>
  11. 11. <ul><li>Litmus paper in bases will turn/stay blue. </li></ul>
  12. 12. <ul><li>pH- the measurement of the concentration of H + ions in it. </li></ul><ul><li>It measures how acidic or basic a solution is. </li></ul>
  13. 13. Acid = pH 0-7 Neutral = 7 Base = 7-14
  14. 14. <ul><li>Buffer - a solution containing ions to minimize the effects on pH. </li></ul>

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