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25 Cards in this Set

  • Front
  • Back
acid base equilibria
-arrhenius dissociation theory
- lowry-bronsted theory
- lewis theory
arrhenius dissociation theory
acid- liberates H in aq soln
base - liberates OH in aq soln
lowry bronsted theory
more powerful applies to aqueous and non -aq

commonly used pharmaceutical and biologic sys

acid- c or u capable of donating proton

base - c or u capable of accepting a proton from an acid
conjugate acid base pair
hydronium ion H3O +
hydrated proton in water
lewis theory
acid- molecule.ion that accepts an electron pair from another atom

base - subs that donates an electron pair to be shared w/ another atom
H conc

expressed in exponential notation as pH
logarithm of the receiprocal of the H conc
pH value
negative logarithm of H value
dec pH
inc H conc
complete separation of ions in a crystal lattice when salt is dissolved
separation of ions in soln when the ions are assic by interionic attraction
henderson hasselbach equation
describes the relation between ionized and unionized species of a weak electrolyte
degree of ionization
fraction of a weak electrolyte that is ionized in soln depends solely on the pH of soln and pka oth the weak electrolyte
inc pH
inc solubility of weak acid

dec solubility of weak bases
mixture of salt w/ acid air base that resist chgs in pH when small quantities of acid or bases are added

commonly prepared fr weak acid and their salts
weak bases
buffer action
resistance to a chg in pH
buffer capacity
ability of a buffer soln to resist chgs in pH
smaller pH chg caused by addition of a given amt of acid or base
inc buffer capacity of soln
buffer capacity
- # if g equivalents of an acid or bases that chgs the pH of 1L of buffer soln by 1 unit
-affected by conc of buffer constituents
inc conc - inc acid or base reserve
-depends in value of the ratio of salt to the acid form
inc viscosity of dispersion med
dec rate of settling/ flotation
rate of destabilization
slowes by inc in viscosity
-liq particle of dispersed phase merge to form larger particles
-prevented by interfacial film of surfactant around the droplets
precents contact of the liw phase of the droplets