1. Importance of Water
Part 1

2. Water, pH, Acids, Bases, Buffers, and You

3. “Chemical reactions underlie all physiological processes.”

4. Organic Compounds contain carbon covalently bonded
large - macromolecules
made by living things

5. Inorganic Compounds all others, essential for life Carbon dioxide CO2
Water H2O
Carbon dioxide CO2
Oxygen O2

7. Water
most abundant and important
60% to 80% vol. of living cells

8. Why is water important to you?
Importance of Water to Humans

9. 1. high heat capacity prevents sudden changes in temperature
ex: blood (contains water) distributes heat

10. 2. high heat vaporization
sweat cools the body
heat energy is released as bonds are broken (from liquid to gas)

13. 3. polarity / solvent properties
biological molecules do not react chemically unless they are in solution
all chemical reactions occurring in the body depend on water’s solvent properties