HYDRATION NUMBERS AND BULK PROPERTIES OF NH4+ Cl-, AND NO3- IONS IN SOLUTION AT 298.15 K: CONCENTRATION DEPENDENCE
V. P. Korolev1,2
1Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
2Ivanovo State University of Chemistry and Technology, Ivanovo, Russia
Keywords: кажущиеся и парциальные объемы, гидратные числа ионов, хлорид аммония, нитрат аммония, apparent and partial volumes, hydration numbers of ions, ammonium chloride, ammonium nitrate
Abstract
A method is proposed for determining the hydration number of an individual ion within the approach (V. P. Korolev, J. Struct. Chem. , 55, No. 3, 463 (2014)). In an infinitely dilute solution, the hydration numbers of ions are given by the formulas NH4+(H2O)2, Cl-(H2O)4, and NO3-(H2O)7. The structure of aqueous complexes is discussed, and a structurally relevant parameter, i.e., the density of water of hydration, is determined. Salt concentration dependences are derived for the hydration number and apparent volume of NH4+, Cl-, and NO3- ions. The density of the cationic (Н2О-NH4+) and anionic (Н2О-Cl- and Н2О-NO3-) systems is calculated.
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