Lecture 4 - Properties Of Water

Question 1

Describe solvent

Answer 1

The dissolver

Question 2

Describe solute

Answer 2

The dissolvee

Question 3

Describe adhesion

Answer 3

When water is attracted to other polar substances

Question 4

Describe cohesion

Answer 4

Works well together

Question 5

Describe surface tension

Answer 5

Area where water area is separated from air/atmosphere (ex. skin)

Question 6

Describe heat capacity

Answer 6

Keep temperature comparable with those of living organisms

Question 7

1 calorie =

Answer 7

1g H2O to raise 1 degree Celsius

Question 8

The capillary tube at the plasma center after pricking your finger would fall under……….

Solvent
Adhesion
Cohesion
Surface tension
Heat capacity

Answer 8

Adhesion

Question 9

What does it mean to be hydrophilic

Answer 9

Water loving - molecules that dissolve in/attract water

Question 10

What does it mean to be hydrophobic

Answer 10

Water fearing - molecules can’t dissolve in/attract water

Question 11

True/False: water shrinks when it freezes

Answer 11

FALSE! Water expands when freezes

Question 12

True/False: most things get more dense when they go from liquid to solid, but water gets less dense when it changes from liquid to solid

Answer 12

True

Question 13

gauge of how acidic or alkaline a solution is

Answer 13

pH scale

Question 14

Which side of the pH scale contains more OH- ions (acidic, alkaline)

Answer 14

alkaline

Question 15

Which side of the pH scale contains more H+ ions (acidic, alkaline)

Answer 15

acidic

Question 16

Are most household cleaners acidic or alkaline

Answer 16

alkaline

Question 17

Pair of weak bases & acids that resist pH changes

Answer 17

buffer systems

Question 18

maintains he pH where the system needs it to be

Answer 18

buffer systems