1. Water Discussion
February 22, 2019

2. I. Basic Properties of Water
Chemical Formula: H2O
Boiling Point: 100oC
Freezing Point: 0oC

3. II. Types of Bonds Oxygen bonded to 2 hydrogen atoms by covalent bonds
Water is polar
Has opposite charges on molecule because electrons are more attracted to oxygen

4. II. Types of Bonds (cont.)
Hydrogen bonds form between water molecules
Hydrogen bonds that form between water molecules account for some of the essential and unique properties of water
Attraction keeps water liquid over a wider range of temperature
Energy required to break multiple hydrogen bonds causes water to have a high heat of vaporization

5. III. Hydrophilic vs. Hydrophobic
Hydrophilic: any substance that likes water (WATER-LOVING)
Ionic or polar substances
Some hydrophilic substances dissolve in water (ex. Salt) and others don’t (cotton)
Hydrophobic: any substance that doesn’t like water (WATER-FEARING)
Usually nonpolar/non-ionic substance

6. Structural Drawing of 3 H2O molecules

7. Follow the directions on the sheet! What happened?
Water Inquiry Lab
Follow the directions on the sheet! What happened?