1. 2. Intro to Functional Groups

2. Water: A special molecule The solvent in cells, tissues and organs is water. Four special properties of water are: 1. Hydrogen bonding Effects: cohesion, adhesion, surface tension. More energy is needed to break hydrogen bonds than other intermolecular bonds, which gives water a high specific heat capacity. 2. Density Effects: Ice is the only solid that floats in its liquid! This insulates water under ice.

3. Water: A special molecule 3. Polar nature of the bond Effects: as a solvent, water allows polar molecules and ionic compounds to dissolve due to water’s polarity. 4. Dissociation of intramolecular bonds Effects: 1 in 10 7 water molecules dissociates to form H + and OH - ions. This is a pH of 7 = NEUTRAL.

4. Functional Groups Functional groups are parts of larger molecules. They greatly influence biological reactivity because they have negative or positive regions that react to form bonds.

5. Draw the structural formula.