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Ion Hydration and Association in Aqueous Potassium Phosphate Solutions

Eiberweiser, Andreas ; Nazet, Andreas ; Hefter, Glenn ; Buchner, Richard


Ionic hydration and ion assocn. in aq. solns. of KH2PO4, K2HPO4, and K3PO4 at 25 °C up to high concns. have been investigated using dielec. relaxation spectroscopy (DRS)​. The three phosphate anions were found to be extensively hydrated, with total hydration nos. at infinite diln. of ∼11 (for H2PO4-​)​, ∼20 (HPO42-​)​, and ∼39 (PO43-​)​. These values are indicative of the existence of a second ...


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