2.3 Water and pH

Question 1

Cohesion

Answer 1

attraction of water molecules to eachother

Question 2

Adhesion

Answer 2

attraction of water to other polar molecules or ions

Question 3

Water is a universal solvent by forming ____ of ______ around molecules.

Answer 3

forming spheres of hydration around molecules

Question 4

The substance that is dissolved

Answer 4

Solute

Question 5

What a substance is dissolved in

Answer 5

Solvent

Question 6

Water is an excellent solvent because

Answer 6

Most things are polar

Question 7

___ and ___ are readily dissolved in water

Answer 7

Ions and polar molecules

Question 8

Oil and water don’t mix because

Answer 8

Lipids are not water-soluble because it’s a non polar molecule.

Question 9

Non polar solvent example

Answer 9

Alcohol

Question 10

Water has a high

Answer 10

specific heat (absorbs energy without raising temp)

Question 11

One calorie is

Answer 11

the amount of energy required to raise one mL of water by one degree centigrade

Question 12

Proton is the same as

Answer 12

A hydrogen ion (+)

Question 13

pH is a measure of

Answer 13

• measure of hydrogen ion conc.
• very small highly reactive
• key for biological function

Question 14

Acidic solutions have more

Answer 14

hydrogen ions (protons)

Question 15

Basic solutions have more

Answer 15

hydroxide ions (OH-)

Question 16

pH scale is

Answer 16

inverse logarithmic

Question 17

Acids will increase___ and decrease ___

Answer 17

Proton conc. , pH

Question 18

Base will increase ____ and ____

Answer 18

Hydroxide ratio and pH

Question 19

An acid is a ____ _____.

Answer 19

Proton donor

Question 20

A base is a _____ ______.

Answer 20

Proton acceptor

Question 21

Buffer is

Answer 21

• a solution capable of accepting protons or hydroxide ions without changing pH

Question 22

Normal physiological pH is

Answer 22

7.35 - 7.45

Question 23

Blood is a

Answer 23

physiological buffer.