NDLI: Bulk properties and hydration numbers of components of water–salt, water–urea, and water–urea

Content Provider	Springer Nature Link
Author	Korolev, V. P.
Copyright Year	2016
Abstract	With an increase in the concentration of additives, the hydration numbers of compounds decrease. Thus, in a saturated 54.6% solution, urea loses approximately 3/4 of the initial amount of water, forming an aquacomplex of the composition (NH$_{2}$)$_{2}$CO∙H$_{2}$O. In a supersaturated 44% solution, the sodium chloride aquacomplex is dehydrated by 2/3, and in a supersaturated 67% solution, sodium sulfate is dehydrated by 5/6. The density of these solutions is 1.354÷1.360 g/cm$^{3}$ (44% NaCl) and 1.800÷1.849 g/cm$^{3}$ (67% Na$_{2}$SO$_{4}$). In a saturated urea solution, NaNO$_{3}$, NaCl, and Na$_{2}$SO$_{4}$ complexes lose 53÷55% of hydration water. It is shown that the interactions in the binary water–urea system somewhat increase the hydration number of the salts (structural hydration). The hydration water density, a structurally important characteristic, increases in the series of solutions of urea, NaNO$_{3}$, NaCl, and Na$_{2}$SO$_{4}$. In the same series of additives, the excess volume of binary water–urea and water–salt systems becomes more negative.
Starting Page	947
Ending Page	954
Page Count	8
File Format	PDF
ISSN	00224766
Journal	Journal of Structural Chemistry
Volume Number	57
Issue Number	5
e-ISSN	15738779
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-12-16
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	apparent and partial volumes hydration numbers aqueous solutions urea sodium salts 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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