32.page07 - Fun with P Chemistry Fun Phosphorus Forms of...

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Unformatted text preview: Fun with P Chemistry Fun Phosphorus Forms of phosphorus in the soil solution: H3PO4 < H2PO4- + H + H2PO4- < HPO42- + H HPO42- < PO43- + H + + K1 = .6 x 10 7 -3 pK1 = 2.12 K2 = 6.3 x 10 -8 pK2 = .2 7 K3 = 4.8 x 10 -13 pK3 = 12.3 pH control of P speciation ...
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