1. “Water, water everywhere”
Properties of Water
“Water, water everywhere”

2. Polarity and Hydrogen Bonds
Water molecules are polar because there are uneven distributions of electrons between the oxygen and hydrogen atoms

3. Polarity gives water two important characteristics
Cohesion – attraction between molecules of the SAME substance (Coworkers, Cooperate)
Adhesion – attraction between molecules of different substances

4. Water is not always pure….
Mixture – composed of two or more substances that are physically mixed but not chemically combined (can be separated)
Solution – all components are distributed evenly throughout a solution (saltwater)
Solute – stuff being dissolved (salt)
Solvent – stuff doing the dissolving

5. Cont…
Suspension – the material in the water does not completely dissolve but the small particles remain “suspended” (ex. Blood)

6. PH Acids – any compound that forms H+ ions in solution
Ex.. Tomato juice, Lemon juice, Stomach acid
Bases – a compound that produces OH- ions in solution
Ex.. Bleach, Ammonia, Soap, Sea water

7. PH Scale
7 = neutral
< 7 = acidic
> 7 = basic

8. PH cont…
Buffers – weak acids or bases that help maintain an internal pH of inside living organisms. Sudden spikes or dips in the body pH can lead to serious problems or even death.