Chapter 3: Water

Question 1

Water properties

Answer 1

1. Cohesive behavior
2. Ability to moderate temperature
3. Expansion upon freezing
4. Versatility as a solvent

Question 2

Hydrophilic

Answer 2

Affinity for water, “water loving”

Question 3

Hydrophobic

Answer 3

Repels water, “water hating”

Question 4

Aqueous solution

Answer 4

One in which water is the solvent

Question 5

Water is polar or nonpolar?

Answer 5

Polar

Question 6

Cohesion

Answer 6

Important for transport of water against gravity in plants

Question 7

Adhesion

Answer 7

Water binds to cell walls by hydrogen bonds

Question 8

Moderation of temperature

Answer 8

Water absorbs heat from warmer air and releases stored heat to cooler air

Question 9

Evaporation

Answer 9

Transformation of a substance from liquid to gas

Question 10

Expansive capacity

Answer 10

Hydrogen bonds in ice are more “ordered,” making ice less dense

Question 11

Acids

Answer 11

Dissociate in water and release hydrogen ions (pH less than 7)

Question 12

Bases

Answer 12

Take up hydrogen ions or release hydroxide ions (pH greater than 7)

Question 13

Buffers

Answer 13

Take up excess H+ or OH- and maintain homeostasis

Question 14

Which has a higher concentration of H+ ions, pH of 10 or pH of 2?

Answer 14

pH of 2