1. Water Notes:

2. Water: Composed of two hydrogen atoms and one oxygen atoms H2O Polar Molecule

3. Polarity: Unevenly distributed charges due to unequal forces placed on bonding electrons Oxygen ends slightly negative Hydrogen end slightly positive

4. Results of Polarity: Allows water to form Hydrogen Bonds

5. Result of Polarity: Hydrophilic: All polar molecules attracted to water

6. Result of Polarity: Hydrophobic: Repels non-polar substances such as water

7. Stabilizes Temperature: Hydrogen bonds between molecules absorb heat energy, thus molecules do not move faster, therefore temperature does not rise as quickly Need more heat energy to change temperature

8. Cohesiveness: Hydrogen bonding locks molecules together Surface Tension: Cohesion at the water’s surface

9. Cohesiveness: Adhesion: when water attaches to non-water molecules COHESION ADHESION

10. Cohesiveness: Capillary Action: Movement of water up

11. Universal Solvent: Ions and polar molecules readily dissolve in water Substances such as salt are pulled apart by attraction of opposite charges due to polar structures

12. Density: Water has a density of 1g/mL One of the few substances that is less dense as a solid than liquid Due to hydrogen bonding and resultant pockets