What are Acids & Bases?
ØAn Arrhenius acid is a substance that, when dissolved in water, increases the amount of
hydronium ion over that present in pure water. 
ØLikewise, an Arrhenius base increases the amount
of hydroxide ion over that present in pure water.
ØA Bronsted-Lowry acid is a substance that can
donate a hydrogen ion; and,
Øa Bronsted-Lowry base is a substance that can
accept a hydrogen ion.
ØA Lewis acid is any species that accepts electrons
through coordination to its lone pairs; and,
ØA Lewis base is any species that donates electrons.