Ka and Kb -- Measures of Acid and Base Strength

• Ka

  • HA(aq) + H2O(l) ? H3O+(aq) + A-(aq)
  • Ka = [H3O+][A-] / [HA]

• Kb

  • B(aq) + H2O(l) ? BH+(aq) + OH-(aq)
  • Kb = [BH+][OH-] / [B]

• See Table 17.4, p799

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