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Author Hill, D. G. ♦ Braunstein, J. ♦ Blander, M.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ ELECTRIC POTENTIAL ♦ LATTICES ♦ MEASURED VALUES ♦ SILVER NITRATES ♦ SODIUM CHLORIDES ♦ SODIUM NITRATES ♦ TEMPERATURE
Abstract Measurements of the activity coefficients of AgNO/sub 3/, gamma AgNO/ sub 3/, in dilute solutions of Ag/sup +/ and Cl/sup -/ ions in NaNO/sub were made at 331, 364, 385, 402, 423, 438, and 500 deg C. The concentration dependence of log gamma AgNO/3/ is closer to the symmetric approxinnation based on the quasi- lattice model than to the asymmetric approximation. Average values of the relative energies of ion pair formation, DELTA E, as defined in the quasi- lattice model, were calculated by comparison of the symmetric approximation with the experimental results. For Z = 4, 5, aad b the values of DELTA E averaged over all seven temperatures are -5.13, -4.83, and -4.59 kcal/ mole, respectively. The values of DELTA E were constant at all seven temperatures. The conventional association constant for the formation of the ion pair A/sup +/-C/sup -/, K/sub 1/ , is equal to ZSTAexp(- DELTA E/RT)- 1!. The constancy of DELTA E at all temperatures studied and for all reasonable values of Z means that from measurements of K/sub 1/ at one temperature, one may, in this system, correctly predict K/sub 1/ at all other temperatures by use of the lattice model. (auth)
ISSN 00223654
Educational Use Research
Learning Resource Type Article
Publisher Date 1960-08-01
Publisher Department Oak Ridge National Lab., Tenn.
Journal Journal of Physical Chemistry
Volume Number 64
Organization Oak Ridge National Lab., Tenn.


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