Water/Weak Acids/Buffer Flashcards
Saliva is a …
BUFFER
saliva is a buffer, and then they composed of water
what are the bonds and how do they rank?
Strongest—
Ionic: complete electron transfer
Covalent: electron sharing
Metallic: electrons become delocalized
Weakest—
Polar, nonpolar, and amphipathic
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)
water is known as the …
Universal solvent
Water bond angels
104.5
What bonds are involved in water molecules
Hydrogen bonding
what does water not dissolve?
Organic compounds
nonpolar molecules (bc water is polar)
amphipathics
other properties of water
Polar covalent
Dipole moment (neg and pos)
Dissolves salt
buffers
Common weak acids/buffers:
Acetic acid 3.6-5.6
Oxalic acid
*Carbonic acid 7.35-7.45
—blood: maintains pH
Dissociation constant
saliva composition
Water
Minerals
Proteins
Organic compounds
Saliva pH range
6.2-7.6
Buffering capacity on saliva
Protein
Phosphate
Carbonate
What impacts salivary flow
Sjorgrens syndrome
Medications
Radiation
Sjorgrens syndrome
Genetic disorder that negative impacts the mucous membrane
Enamel demineralization starts at …
5.5 pH
van der waals forces
weak short-range forces of two atoms
distance dependent
neutral/uncharged molecules
what bond has these: weak, forms lattice in ice, charge distribution (angles of bonds changes strength)
hydrogen bonds
weak acids
tendency for dissociation to H+ and A-
partially dissociate
GERD, Bulimia, Hyperemesis, Gastroparesis will affect what in saliva?
acidity changes
ph of stomach acid
1.5-3.5
waters structure is ___ and forms ____ bonds
bent and forms hydrogen bonds
weak acids form good ____ with their conjugate bases
buffers
