5. Water Notes

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5. Water Notes

  1. 1. Water Notes:<br />
  2. 2. Water:<br />Composed of two hydrogen atoms and one oxygen atoms<br />H2O<br />Polar Molecule<br />
  3. 3. Polarity:<br />Unevenly distributed charges due to unequal forces placed on bonding electrons<br />Oxygen ends slightly negative<br />Hydrogen end slightly positive<br />
  4. 4. Results of Polarity:<br />Allows water to form Hydrogen Bonds<br />
  5. 5. Result of Polarity:<br />Hydrophilic: All polar molecules attracted to water<br />
  6. 6. Result of Polarity:<br />Hydrophobic: Repels non-polar substances such as water<br />
  7. 7. Stabilizes Temperature:<br />Hydrogen bonds between molecules absorb heat energy, thus molecules do not move faster, therefore temperature does not rise as quickly<br />Need more heat energy to change temperature<br />
  8. 8. Cohesiveness: <br />Hydrogen bonding locks molecules together<br />Surface Tension: Cohesion at the water’s surface<br />
  9. 9. Cohesiveness:<br />Adhesion: when water attaches to non-water molecules<br />COHESION<br />ADHESION<br />
  10. 10. Cohesiveness:<br />Capillary Action: Movement of water up<br />
  11. 11. Universal Solvent:<br />Ions and polar molecules readily dissolve in water <br />Substances such as salt are pulled apart by attraction of opposite charges due to polar structures<br />
  12. 12. Density:<br />Water has a density of 1g/mL<br />One of the few substances that is less dense as a solid than liquid<br />Due to hydrogen bonding and resultant pockets<br />

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