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Arrhenius acid/base
produces H ions in aqueous or hydroxide
Bronsted and Lowry acids/bases
donates proton and bases accept protons
Lewis acid or base
acid accepts pair of electrons and base donates pair of electrons
can act as either acid or base depending on environment.
strong base/acid --> weak conj
weak base/acid --> weak or strong conj
[!] equivalence point usually ~7 for strong acid-base titrations but not for diprotic strong acids with strong acid conjugate base (H2SO4)
weak acid+strong base

weak base+strong acid
if base > acid (base stronger than acid) --> equivalence point above 7.

if acid>base, equivalence point below 7.
half equivalence point
  • half acid neutralized by base
  • add largest amount of base or acid with least amount of change in pH
  • buffered
  • pH=pka
  • concentration of acid = concentration of base
equivalence point
moles acid = moles base
but may have different volumes and concentrations!!
x of y cards