NDLI: Bulk properties and hydration numbers of ammonium nitrate and ammonium chloride in solution: A structural and thermodynamic analysis

Content Provider	Springer Nature Link
Author	Korolev, V. P.
Copyright Year	2014
Abstract	The apparent volumes of the salts in the systems H$_{2}$O-NH$_{4}$Cl (298 K) and H$_{2}$O-NH$_{4}$NO$_{3}$ (273 K, 298 K, and 323 K) are reproduced with an accuracy of 0.03–0.01 cm$^{3}$/mol by the equation ϕ = ϕ$^{0}$ + Aw 2 0.5 + Bw $_{2}$, where w $_{2}$ is the salt content (mass fractions). The study shows that there is a correspondence between the critical (for determining the hydration number) structural parameters-the intrinsic volume of the electrolyte and the volume of water in ion hydration shells-and the limiting (at w $_{2}$ = 1) partial molar volumes of the components. The hydration numbers at infinite dilution are 6.9 for NH$_{4}$Cl at 298 K and 9.1, 6.7, and 6.4 for NH$_{4}$NO$_{3}$ at 273 K, 298 K, and 323 K. The water volume in ion hydration shells decreases in the sequence: No 3 − , Cl$^{−}$, and NH 4 + . The hydration numbers decrease with increasing salt concentration. The study shows that within a simpler model ϕ = ϕ$^{0}$ + aw 2 0.5 , the hydration numbers are temperature independent.
Starting Page	463
Ending Page	469
Page Count	7
File Format	PDF
ISSN	00224766
Journal	Journal of Structural Chemistry
Volume Number	55
Issue Number	3
e-ISSN	15738779
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-07-24
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	apparent and partial volumes hydration numbers ammonium chloride ammonium nitrate Inorganic Chemistry Physical Chemistry Atomic, Molecular, Optical and Plasma Physics Atomic/Molecular Structure and Spectra Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Physical and Theoretical Chemistry Inorganic Chemistry

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