Water Discussion February 22, 2019.

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Presentation transcript:

Water Discussion February 22, 2019

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

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

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

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

Structural Drawing of 3 H2O molecules

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