The Properties of Water primarily due to polarity
Terms to Know <ul><li>polarity </li></ul><ul><li>hydrogen bond </li></ul><ul><li>cohesion </li></ul><ul><li>adhesion </li>...
Water <ul><li>Most abundant  naturally  occurring liquid </li></ul><ul><li>Liquid at most Earth temperatures  </li></ul><u...
Water     H 2 O <ul><li>As we know - water is   neutral   </li></ul><ul><li>But because the O atom is larger than the H a...
Polar Bonding <ul><li>Polarity really does allow bonding </li></ul><ul><li>They are  hydrogen bonds and  they are very  we...
Forces due to polarity   <ul><li>Cohesion </li></ul><ul><li>Adhesion </li></ul>
<ul><li>The  natural attraction  of a  water  molecule  to  other  water  molecules  </li></ul><ul><li>is called  cohesion...
Cohesion <ul><li>Can be seen as water droplets form </li></ul>
<ul><li>The  attraction  of a  water  molecule  to  another  polar molecule  is  adhesion   </li></ul><ul><li>Molecules su...
Adhesion <ul><li>Can be seen as water droplets form on the spider web (another polar surface) </li></ul>
<ul><li>Two simple properties associated  </li></ul><ul><li>with polarity are  </li></ul><ul><li>Capillary Action </li></u...
Capillary Action <ul><li>We know that gravity is ALWAYS pulling on objects with mass </li></ul><ul><li>Yet water can move ...
 
Surface Tension  <ul><li>Inside a drop of water polar water molecules attract to each other in a  random fashion </li></ul...
Surface Tension
Review <ul><li>Polarity      hydrogen bonding   </li></ul><ul><li>cohesion  adhesion </li></ul><ul><li>surface tension  c...
The End   polarity
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Water's Polarity

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Polarity of water, and all the resulting properties.

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  • great slide..its help me to understand more about water..
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Water's Polarity

  1. 1. The Properties of Water primarily due to polarity
  2. 2. Terms to Know <ul><li>polarity </li></ul><ul><li>hydrogen bond </li></ul><ul><li>cohesion </li></ul><ul><li>adhesion </li></ul><ul><li>surface tension </li></ul><ul><li>capillary action </li></ul>
  3. 3. Water <ul><li>Most abundant naturally occurring liquid </li></ul><ul><li>Liquid at most Earth temperatures </li></ul><ul><li>Unlike most liquids – it expands when frozen </li></ul><ul><li>The lower density of ice allows it to float (4°C most dense) </li></ul>
  4. 4. Water  H 2 O <ul><li>As we know - water is neutral </li></ul><ul><li>But because the O atom is larger than the H atoms – electrons spend more of their time nearer the oxygen </li></ul><ul><li>This gives water a slight overall charge </li></ul><ul><li>That charge is called polarity </li></ul>
  5. 5. Polar Bonding <ul><li>Polarity really does allow bonding </li></ul><ul><li>They are hydrogen bonds and they are very weak </li></ul><ul><li>They last for fractions of a second </li></ul><ul><li>Continuously break and reform </li></ul><ul><li>Polarity really does allow bonding </li></ul><ul><li>They are hydrogen bonds and they are very weak </li></ul><ul><li>They last for fractions of a second </li></ul><ul><li>Continuously break and reform </li></ul>
  6. 6. Forces due to polarity <ul><li>Cohesion </li></ul><ul><li>Adhesion </li></ul>
  7. 7. <ul><li>The natural attraction of a water molecule to other water molecules </li></ul><ul><li>is called cohesion </li></ul>
  8. 8. Cohesion <ul><li>Can be seen as water droplets form </li></ul>
  9. 9. <ul><li>The attraction of a water molecule to another polar molecule is adhesion </li></ul><ul><li>Molecules such as soil and clay (dust) </li></ul><ul><li>Surfaces like glass or paper straws </li></ul><ul><li>Certain clothing fibers and … animal hair </li></ul>
  10. 10. Adhesion <ul><li>Can be seen as water droplets form on the spider web (another polar surface) </li></ul>
  11. 11. <ul><li>Two simple properties associated </li></ul><ul><li>with polarity are </li></ul><ul><li>Capillary Action </li></ul><ul><li>Surface Tension </li></ul>
  12. 12. Capillary Action <ul><li>We know that gravity is ALWAYS pulling on objects with mass </li></ul><ul><li>Yet water can move up a paper towel with relative ease - How can this happen? </li></ul><ul><li>Because the positive and negative charges in the paper attract the polar water molecules ( adhesion ) </li></ul><ul><li>This property of adhesion is called capillary action </li></ul>
  13. 14. Surface Tension <ul><li>Inside a drop of water polar water molecules attract to each other in a random fashion </li></ul><ul><li>At the surface of the drop, water does not attract to the air </li></ul><ul><li>A unified layer of molecules at the surface creates surface tension </li></ul><ul><li>There the water behaves like an flexible sheet allowing denser objects to “sit” on the surface </li></ul>
  14. 15. Surface Tension
  15. 16. Review <ul><li>Polarity  hydrogen bonding </li></ul><ul><li>cohesion adhesion </li></ul><ul><li>surface tension capillary action </li></ul>Forces Properties Forces
  16. 17. The End polarity

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