Abstract
The apparent volumes of the salts in the systems H2O-NH4Cl (298 K) and H2O-NH4NO3 (273 K, 298 K, and 323 K) are reproduced with an accuracy of 0.03–0.01 cm3/mol by the equation ϕ = ϕ0 + Aw 0.52 + 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 NH4Cl at 298 K and 9.1, 6.7, and 6.4 for NH4NO3 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 = ϕ0 + aw 0.52 , the hydration numbers are temperature independent.
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References
K. Fajans and O. Johnson, J. Am. Chem. Soc., 64, 668–678 (1942).
K. P. Mishchenko and G. M. Poltoratskii, Aspects of the Thermodynamics and Structure of Aqueous and Non-Aqueous Electrolyte Solutions [in Russian], Khimiya, Leningrad (1968).
J. C. Hindman, J. Chem. Phys., 36, 1000–1015 (1962).
Y. Marcus, J. Sol. Chem., 23, 831–848 (1994).
M. V. Kaulgud and W. K. Pokale, J. Chem. Soc. Faraday Trans., 91, 999–1004 (1995).
D. W. Hu, J. M. Chen, X. N. Ye, et al., Atmos. Environ., 45, 2349–2355 (2011).
S. L. Clegg and A. S. Wexler, J. Phys. Chem. A, 115, 3393–3460 (2011).
B. E. Conway, R. E. Verrall, and J. E. Desnoyers, Z. Phys. Chem. Leipzig, 230, 157–178 (1965).
F. J. Millero, G. K. Ward, F. K. Lepple, and E. V. Hoff, J. Phys. Chem., 78, 1636–1643 (1974).
R. L. Hahn, J. Phys. Chem., 92, 1668–1675 (1988).
V. N. Afanas’ev and A. N. Ustinov, J. Struct. Chem., 46, No. 3, 446–455 (2005).
Y. Marcus, J. Phys. Chem. B∂ 113, 10285–10291 (2009).
V. P. Korolev, J. Struct. Chem., 52, No. 4, 737–742 (2011).
A. N. Ustinov and V. N. Afanas’ev, J. Struct. Chem., 53, No. 2, 313–322 (2012).
Y. Marcus, J. Sol. Chem., 39, 1031–1038 (2010).
Gy. Jákli, J. Chem. Thermodyn., 39, 1474–1483 (2007).
H. E. Wirth, J. Phys. Chem., 71, 2922–2929 (1967).
I. Danielewicz-Ferchmin and A. R. Ferchmin, Physica B, 245, 34–44 (1998).
M. Sakurai, J. Chem. Eng. Data, 36, 424–427 (1991).
V. K. Abrosimov and E. V. Ivanov, in: Water in Non-Aqueous Solvents: State and Solvation, in Water: Structure, State, and Solvation. Recent Advances (Problems of Solution Chemistry), A. M. Kutepov (ed.) [in Russian], Nauka, Moscow (2003).
Y. Marcus, J. Chem. Soc. Faraday Trans., 89, 713–718 (1993).
P. A. M. Walker, D. G. Lawrence, and G. W. Neilson, J. Chem. Soc. Faraday Trans. I, 85, 1365–1372 (1989).
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Original Russian Text © 2014 V. P. Korolev.
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Translated from Zhurnal Strukturnoi Khimii, Vol. 55, No. 3, pp. 493–499, May–June, 2014.
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Korolev, V.P. Bulk properties and hydration numbers of ammonium nitrate and ammonium chloride in solution: A structural and thermodynamic analysis. J Struct Chem 55, 463–469 (2014). https://doi.org/10.1134/S002247661403010X
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DOI: https://doi.org/10.1134/S002247661403010X