May 28, 2010, Newsletter Issue #292: Chemistry - Percent Dissociation or Percent Ionization
Tip of the Week
Percent dissociation or Percent ionization: Percent is equal to the part divided by the whole times 100: So, percent ionization is equal to the fraction of the solute that is ionized times 100. For a weak acid,
this gives: [A^-]eq
% ionization (HA) = -------- x 100
[HA]init
Where [A^-]eq is the concentration of the anion at equilibrium, and [HA]init is the initial concentration of the weak acid.
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