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
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of
hydroxide ion over that
present in pure water.
ØA
Lewis acid is any species that accepts electrons
![](space.gif)
through coordination
to its lone pairs; and,
ØA
Lewis base
is any species that donates
electrons.