1. The most important chemical of all!!

2. Polar Covalent Bonds Water has polar covalent bonds, meaning electrons are shared unequally Because of this, one side of the water molecule is positive, and the other is negative

3. Universal Solvent Water is known as the universal solvent because it can dissolve most substances

4. Example: Salt Water The positive end of the water molecule (hydrogen) attracts to the negative end of the salt molecule (chlorine) The negative end of the water molecule (oxygen) attracts to the positive end of the salt molecule (sodium) CLICK HERE FOR SALT WATER ANIMATION CLICK HERE FOR SALT WATER ANIMATION CLICK HERE FOR SALT WATER ANIMATION

5. Motion of Liquid Water Liquid water molecules move at different speeds, in different directions

6. Water Questions Why does ice float? Hmmm… Why does water expand when it is frozen? Hmmm…. Ice floats and expands because as it is freezing, tiny air pockets form in the ice, making it less dense and take up space