Given the following graph, what are the pKa's of the polyprotic species? Analytical Concentrations of Polyprotic Acid 1.0000 0.8000 0.6000 a1 0.4000 •a2 0.2000 a3 0.0000 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 pH Fraction

In contrast to monoprotic acids, which can only provide one proton per molecule, polyprotic acids can donate more than one proton per molecule. Diprotic acid (two potential protons to give) and triprotic acid (three potential protons to donate) are two forms of polyprotic acids with more precise nomenclature (three potential protons to donate).