Water/Weak Acids/Buffer

Question 1

Saliva is a …

Answer 1

BUFFER
saliva is a buffer, and then they composed of water

Question 2

what are the bonds and how do they rank?

Answer 2

Strongest—
Ionic: complete electron transfer
Covalent: electron sharing
Metallic: electrons become delocalized
Weakest—

Question 3

Polar, nonpolar, and amphipathic

Answer 3

Polar: uneven distribution of electrons (H-Cl, H-O-H)

Nonpolar: even distribution of electrons (N=-N, O=C=O)

Amphipathic: mix of polar and nonpolar (phospholipid membranes)

Question 4

water is known as the …

Answer 4

Universal solvent

Question 5

Water bond angels

Answer 5

104.5

Question 6

What bonds are involved in water molecules

Answer 6

Hydrogen bonding
*add photo

Question 7

what does water not dissolve

Answer 7

Organic compounds, nonpolar molecules ( bc water is polar), and amphipathics

Question 8

other properties of water

Answer 8

Polar covalent
Dipole moment (neg and pos)
Dissolves salt

Question 9

buffers

Answer 9

Common weak acids/buffers:

Acetic acid 3.6-5.6

Oxalic acid

Carbonic acid 7.35-7.45
—— blood: maintains pH

Question 10

Dissociation constant

Answer 10

K= (H)(A) / (HA)

Helps with titration curves

Question 11

saliva composition

Answer 11

Water
Minerals
Proteins
Organic compounds

Question 12

Saliva pH

Answer 12

6.2-7.6

Question 13

Buffering capacity on saliva

Answer 13

Protein
Phosphate
Carbonate

Question 14

What impacts salivary flow

Answer 14

Sjorgrens syndrome
Medications
Radiation

Question 15

Sjorgrens syndrome

Answer 15

Genetic disorder that negative impacts the mucous membrane

Question 16

Enamel demineralization starts at …

Answer 16

5.5 pH