Limiting Conductivities and Ion Association Constants of Aqueous NaCl under Hydrothermal Conditions: Experimental Data and Correlations

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• 作者：G. H. Zimmerman ; H. Arcis ; P. R. Tremaine
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：September 13, 2012
• 年：2012
• 卷：57
• 期：9
• 页码：2415-2429
• 全文大小：504K
• 年卷期：v.57,no.9(September 13, 2012)
• ISSN：1520-5134

文摘

Frequency-dependent electrical conductivities of solutions of aqueous sodium chloride have been measured from T = 298 K to T = 623 K at p = 20 MPa, over a very wide range of ionic strength (2路10p>鈥?p> to 0.17 mol路kgp>鈥?p>) using a unique high-precision flow-through alternating current (AC) electrical conductance instrument. Experimental values for the equivalent conductivity, 螞, were used to calculate molar conductivities at infinite dilution, 螞掳, using the Fuoss鈥揌sia鈥揊ernandez鈥揚rini (FHFP) and Turq鈥揃lum鈥揃ernard鈥揔unz (TBBK) ionic conductivity models. The resulting values for the limiting conductivity 螞掳 and the ion association constant of NaCl, from this work and critically evaluated literature data above 277 K, were represented to within the combined experimental uncertainties, as functions of viscosity and solvent density, respectively. New values and new correlations are reported for the limiting equivalent conductivities of the sodium ion, 位掳(Nap>+p>), and the chloride ion, 位掳(Clp>鈥?/sup>) from 277 K and 100 kPa to 1073 K and 500 MPa.