1. Properties of Water

2. Learning Objectives  Discuss the unique properties of water.  Differentiate between solutions and suspensions.  Explain what acidic solutions and basic solutions are.

3. The Water Molecule Water molecules are polar; the charges are unevenly distributed in the molecule. (-) (+)

4. Hydrogen Bonding Hydrogen bond

5. Cohesion Cohesion: attraction between molecules of the same substance

6. Adhesion and Heat Capacity Adhesion: attraction between molecules of different substances Heat capacity: amount of heat it takes to raise temperature Meniscus

7. Solutions and Suspensions Water’s polarity gives it the ability to dissolve both ionic compounds and other polar molecules.

8. Acids, Bases, and pH Low pH = acidic; higher concentration of H + High pH = basic; lower concentration of H + Pure water Human blood Stomach acid

9. Buffers Buffers help maintain homeostasis in organisms. Base Neutral Acid Unbuffered base + acid = _________ Buffered base + acid = ________ acidic pH basic pH

10. Student Worksheet Answers