Abstract
Densities and ultrasonic velocities of NaCl−CaCl2 aqueous mixtures at 25 °C have been measured for the ionic strength range I=0.30–20.0. Where NaCl solubility permitted, both properties were measured over the range of compositions from pure NaCl to pure CaCl2 at constant I. Apparent molar volumes and apparent molar compressibilities of the mixtures were calculated. The Pitzer form of the specific interaction theory is used to predict the properties of the binary mixtures from the properties of the single salt solutions. It provides a good fit over the full range of ionic strength for apparent molar volumes but a much inferior fit for compressibilities. It is also clear that in the high ionic strength range, explicit mixing parameters must be included for an excellent fit.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H. S. Harned and B. B. Owen,The Physical Chemistry of Electrolyte Solutions, 3rd edn., (Reinhold, New York, 1958).
G. Scatchard, R. M. Rush, and J. S. Johnson,J. Phys. Chem. 74, 3786 (1970).
M. Whitfield, inActivity Coefficients in Electrolyte Solutions, R. M. Pytkowicz, ed., (CRC Press, Boca Raton, FL, 1981) Chap. 3.
E. A. Guggenheim and J. C. Turgeon,Trans. Faraday Soc. 51, 747 (1955).
F. J. Millero, inActivity Coefficients in Electrolyte Solutions, R. M. Pytkowicz, ed., (CRC Press, Boca Raton, FL, 1981) Chap. 2.
K. S. Pitzer, inThermodynamics of Aqueous Systems with Industrial Applications, S. A. Newman, ed., (ACS Symposium Series 133, ACS Publications Washington, DC, 1980) Chap. 23.
R. N. Roy, J. J. Gibbons, J. K. Trower, and G. A. Lee,J. Solution Chem. 9, 535 (1980).
R. N. Roy, J. J. Gibbons, D. D. Bliss Jr., R. G. Casebolt, and B. K. Baker,J. Solution Chem. 9, 911 (1980).
K. H. Khoo, T. K. Lim, and C. Y. Chan,J. Chem. Soc. Faraday Trans. I. 74, 2037 (1978);J. Solution Chem. 10, 683 (1981).
C. E. Harvie and J. H. Weare,Geochim. Cosmochim. Acta 44, 981 (1980).
P. Picker, E. Tremblay, and C. Jolicoeur,J. Solution Chem. 3, 377 (1974).
G. Perron, A. Roux, and J. E. Desnoyers,Can. J. Chem. 59, 3049 (1981).
F. Vaslow, Oak Ridge National Laboratory Report ORNL-TM-1438 (1966).
F. J. Millero and T. Kubinski,J. Acoust. Soc. Am. 57, 312 (1975).
F. J. Millero, G. K. Ward, and P. V. Chetirkin,J. Acoust. Soc. Am. 61, 1492 (1977).
F. T. Gucker, C. L. Chernick, and P. Roy-Choudhury,Proc. Natl. Acad. Sci. 55, 12 (1966).
L. A. Dunn,Trans. Faraday Soc. 64, 2951 (1968);62, 2348 (1966).
F. J. Millero inWater and Aqueous Solutions R. A. Horne, ed. (Wiley-Interscience, New York, 1972) Chap. 13.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kumar, A., Atkinson, G. & Howell, R.D. Thermodynamics of concentrated electrolyte mixtures. II. Densities and compressibilities of aqueous NaCl−CaCl2 at 25 °C. J Solution Chem 11, 857–870 (1982). https://doi.org/10.1007/BF00644749
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00644749