H2PO4 anion


Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

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Individual Reactions

H2O4P- + Hydrogen cation = Phosphoric Acid

By formula: H2O4P- + H+ = H3O4P

Quantity Value Units Method Reference Comment
Deltar330.5 ± 5.0kcal/molG+TSMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)
Quantity Value Units Method Reference Comment
Deltar323.0 ± 4.9kcal/molIMRBMorris, Knighton, et al., 1997gas phase; Between HCl, HBr. For neutral heat, «DELTA»Hvap=3/2*H2SO4, plus «DELTA»Hf(liquid)

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Morris, Knighton, et al., 1997
Morris, R.A.; Knighton, W.B.; Viggiano, A.A.; Hoffman, B.C.; Schaeffer III, H.F., The Gas-phase Acidity of H3PO4, J. Chem. Phys., 1997, 106, 9, 3545, https://doi.org/10.1063/1.473465 . [all data]


Notes

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