1. Molecules Molecules in action Part II

2. Hydrogen Bonds

3. Properties Adhesion- water molecules stick to unlike surfaces such as glass or plastic( -) Meniscus Cohesion – water molecules stick to each other – “ sticky Mickeys” – drop of water Water exists in three states on Planet earth ( Liquid – aquatic environment outside us and inside us)

4. More Specific heat – Water does not change temperature as rapdily as air- high specific heat Density of water = 1g/ml Surface tension – Solutions – universal solvent- Dissolves – salts( ionic bonds), sugar( non polar covalent), and polar covalent( unequal sharing)

5. Water and solutions

7. Molecules in water - polar

8. Yea or Nay Hydrophilic – water loving Hydrophobic – water hating or fearing Polar molecule?

9. Water and hydrogen ions http://www.biology.arizona.edu/b iochemistry/problem_sets/ph/ph.html http://www.biology.arizona.edu/b iochemistry/problem_sets/ph/ph.html

10. Acid and Base Acids are hydrogen donors or proton donors COOH COO- + H+ Bases are hydrogen acceptors or proton acceptors NH2 NH3+

11. Acids and Bases

12. pH pH = The concentration of H+ ions The negative logarithm of the hydrogen ion concentration in an aqueous solution. pH = - log[ H30]

13. Blood buffers

15. pH and measurement- pHydrion paper

16. pH measurement – pH meter

17. Carboxylic acids

18. Ionization of Acids H2CO3(aq) H+(aq) + HCO3- (aq)

19. Buffers H2PO4-(aq) H+(aq) + HPO4- 2 (aq)

20. Buffering capacity

21. Amino acids

22. Amino Acid Structure Alanine

23. Amino acids http://www.johnkyrk.com/aminoa cid.html http://www.johnkyrk.com/aminoa cid.html

24. Formulas Molecular Formula Electron Dot Diagram Structural Formula C2H6OC2H6O H H ·· ·· ·· H : C : C : O : H ·· ·· ·· H H H H | | H - C - C - O - H

25. Structural formulas and isomers C2H6OC2H6O H H ·· ·· ·· H : C : O : C : H ·· ·· ·· H H H H | | H - C - O - C - H | | H H

26. Structural formula and condensed Complete Structural Formula H H H | | | H - C - C - C - H | | | H H-C-H H | H Condensed Structural Formula CH3CHCH3CH3 or CH(CH3)3

27. Covalent Bonds Carbonic acid

28. Isomers