1. Inorganic and Organic Compunds!!

2. Inorganic Compound

3. The importance of Water
H2O

4. Water is necessary for life
Water = H2O
H2 + O = H2O
Polar covalent Bond
ALL LIFE OCCURS IN WATER
Inside and outside the cell

5. Polar Covalent Bond Pair of electrons shared unequally by 2 atoms
Oxygen has a stronger “attraction” for the electrons
Oxygen is higher electronegativity

6. Hydrogen bonding -positive H atom in one H20 molecule attracted to negative O molecule is another H20 -can occur whenever an –OH exists in a larger molecule -Weak bond -creates a sticky molecule

7. Animal Cell made up of mostly water

8. Lungs 90% Blood 82% Skin 80% Muscle 76% Bones 28% 80kg Man = 48kg Water

9. Special properties of water
Cohesion & adhesion
Surface tension, capillary action
Good solvent
Many molecule dissolve in H2O
Hydrophilic vs. hypdrophobic
Lower density as solid
Ice floats!
High specific heat
Water stores heat
High heat of vaporization
Heats and cools slowly

10. Cohesion & Adhesion H bonding between H2O is cohesion
Water is “sticky”, sticks to itself
Surface tension
Drinking straw
H bonding between H2P and other substances is adhesion
Capillary action
Meniscus
Water climbs up towels and cloths

12. Water is the solvent of life
Polarity makes H2O a good solvent
Polar H2O molecules surround + & - ions
Solvents dissolve solutes creating solutions

13. Can you dissolve in Water
Can you dissolve in Water? Hydrophilic – ATTRACTS WATER Polar or Non-Polar??

14. OR NOT?
Hydrophobic – chemicals that do NOT dissolve in water. Chemicals with no attraction to water.
Polar or Non-Polar?

16. H2O is less dense when a solid
**H2O is less dense when a solid. MOST chemicals are more dense when solids **H bonds form crystals

18. Specific Heat Water resists heat
Can absorb heat from biochemical reactions
Water evaporates. Organisms cool using evaporated heat of water.

19. Ionization and pH of H2O Water ionizes pH = the power of hydrogen
pH scale measures how acidic or basic something is
Body ideal pH is 7.4

21. How H2O that effect the body?
Blood?
Urine?
pH of cells?
Anything else???