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Conductivity of Phosphoric Acid, Sodium, Potassium, and Ammonium Phosphates in Dilute Aqueous Solutions from 278.15 K to 308.15 K
Authors:Elena N. Tsurko  Roland Neueder  Josef Barthel  Alexander Apelblat
Affiliation:(1) Department of Physical Chemistry, Kharkov State University, 310077 Kharkov, Ukraine;(2) Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regensburg, Germany;(3) Institut für Physikalische und Theoretische Chemie, Universität Regensburg, D-93040 Regens-burg, Germany
Abstract:Precise conductivity measurements on aqueous solutions of phosphoric acid, sodium dihydrogen phosphate, potassium dihydrogen phosphate, ammonium dihydrogen phosphate, disodium hydrogen phosphate, dipotassium hydrogen phosphate, diammonium hydrogen phosphate, sodium phosphate, and potassium phosphate were performed from 5 to 35°C. Data analysis was executed by the use of the Quint–Viallard equation for unsymmetrical electrolytes. Equations are given for the concentration dependence of electrolyte and single-ion conductivities at all temperatures.
Keywords:Temperature dependence of conductivity  aqueous solutions  phosphoric acid  sodium dihydrogen phosphate  potassium dihydrogen phosphate  ammonium dihydrogen phosphate  disodium hydrogen phosphate  dipotassium hydrogen phosphate  diammonium hydrogen phosphate  sodium phosphate, potassium phosphate
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