Ch 3 Water

Question 1

List and explain the four properties of water

Answer 1

Cohesive behavior, Ability to moderate temperature, Expansion upon freezing, Versatility as a solvent

Question 2

hydrophobic

Answer 2

repels water

Question 3

hydrophilic

Answer 3

likes water

Question 4

water’s cohesive behavior

Answer 4

• water molecules are linked by multiple hydrogen bonds which are constantly changing, and these linkages make water more structured than most other liquids
• Water molecules will adhere to anything that is polar as well as itself

Question 5

water’s Ability to moderate temperature

Answer 5

Water doesn’t gain or lose energy easily

Question 6

water’s Expansion upon freezing

Answer 6

the hydrogen bonds keep the molecules ‘at arm’s length,’ far enough apart to make ice about 10% less dense than liquid water.

Question 7

water’s versatility as a solvent

Answer 7

Oxygen has regions of partial negative charge (attracted to catons), and hydrogen has regions of partial positive charge (attracted to anions). Can create a hydration shell (sphere) around solutes (the substance that is being dissolved) and eventually dissolve all the ions