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Let’s consider the dissociation of phosphoric acid H3PO4. All four possible protonation states, with H number...

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Chemistry

Let’s consider the dissociation of phosphoric acid H3PO4. Allfour possible protonation states, with H number from zero to three,must co-exist in equilibrium.

H3PO4 <-> H2PO4- <-> HPO42- <-> PO43-

pK1=2 pK2=7 pK3=12

Find relative populations of all four states at the pH of thehuman blood, ~7.4.

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