Orthophosphate(aq)
Formation Gibbs Energy
Estimated ΔfG'm -1073.3 ± 1.5 [kJ/mol]    Enter custom concentration »
Estimated ΔfG'° -1056.2 ± 1.5 [kJ/mol]
Estimated using Component Contribution (2013)
pH
Ionic strength [M]
General Properties
Formula H3O4P
Common names Orthophosphate; Orthophospate; Orthophosphoric acid; Phosphate; Phosphoric acid; hpo4-2-; C00009; Pi
Molar Mass 97.98 [Da]
Structure
Links KEGG »
Species Formation Energies
Phase Net charge #Hydrogens Δf [kJ/mol] ΔfG'° [kJ/mol] Reference
aqueous -3 0 -1020.0 -1025.5 Component Contribution (2013)
aqueous -2 1 -1093.6 -1055.5
aqueous -1 2 -1133.3 -1052.8
aqueous 0 3 -1143.5 -1021.9
aqueous -2 1 -1096.1 -1058.0 Alberty (2006)
aqueous -1 2 -1137.3 -1056.8