Period+3+Chem+Ch+3


 * AP Biology**
 * Chapter 3 Guided Reading Assignment**

1. Why is water considered a polar molecule?

2. For each of the below listed properties of water – briefly define the property and then explain how water’s polar nature and polar covalent bonds contribute to the water special property. Include an example in nature of each property also. a. Cohesion

b. Adhesion

c. Surface tension

d. High specific heat

e. Heat of vaporization

f. Evaporative cooling

3. What is special about water and density?

4. Define the following terms: a. Solute

b. Solvent

c. Aqueous solution

d. Hydrophilic

e. Hydrophobic

f. Colloid

g. Hydration shell

h. Molarity

5. Label the diagram below to demonstrate the dissociation of the water molecule and then relate this diagram to pH.

6. What defines an acid and a base?

7. Why are “apparently” small changes in pH so important in biology?

8. What is a buffer and write and explain the carbonic acid buffer system in human blood – yes we are back to the equation AGAIN!

9. What is acid precipitation and why is it important to living organisms?