Biochemistry - Water

Question 1

What are the Intramolecular forces in the water?

Answer 1

polar covalent bonding

Question 2

What causes the Intramolecular forces in the water?

Answer 2

unequal sharing of electrons

Question 3

What are the Intermolecular forces in the water?

Answer 3

Hydrogen bonding

Question 4

What causes the Intermolecular forces in the water?

Answer 4

the Dipole(water is polar)

Question 5

What are the five unique properties of water?

Answer 5

• Universal Solvent
• High heat Capacity/ Heat of Vaporization
• Cohesive/Adhesive
• High Surface Tension
• Low Density in Solid-state “Ice”

Question 6

What makes water the Universal Solvent? Why is this important?

Answer 6

• It will dissolve other polar molecules and ionic compounds (because of its polarity)
• transports in our bodies
• facilitates reactions

Question 7

What makes water have a high heat capacity and vaporization point? Why is this important?

Answer 7

• takes a high amount of energy to change states because of H-bonds
• moderates our temp (sweating)
• buffer internal temp changes
• moderates climate

Question 8

What makes water cohesive and adhesive? Why is this important?

Answer 8

Cohesive:
- water molecules stick together because of H-bonds
Adhesive:
- will bond to other surfaces because of polarity

• transportation system
• lubricants

Question 9

What makes water have a high surface tension? Why is this important?

Answer 9

• Because of H-bonds

- surface habitat for organisms

Question 10

What makes water have a low density in solid-state “ice”? Why is this important?

Answer 10

• H-bonds causes molecules to arrange in crystalline structures (more air in structures so it floats)
• aquatic habitats are isolated when the top freezes over
• prevents sudden temp changes