Results 171 to 180 of about 31,577 (222)

Pitzer and Pitzer–Simonson–Clegg Modeling Approaches: Ternary HCl + 2-Propanol + Water Electrolyte System

Journal of Solution Chemistry, 2010
Despite its success for modeling electrolyte thermodynamics in aqueous media, the use of the Pitzer approach for the investigation of electrolytes in nonaqueous or in mixed solvent media is still very limited. Further, a review of the literature reveals that there are no more than a few research groups who have used the exact form of the Pitzer ...
Farzad Deyhimi, Zohreh Karimzadeh
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Pitzer and Pitzer–Simonson–Clegg modeling approaches: Ternary HCl+1-propanol+water electrolyte system

Fluid Phase Equilibria, 2010
Abstract A survey of literature reveals that the use of Pitzer approach for modeling electrolyte in nonaqueous or in mixed solvent media is still very scarce. Moreover, only two research groups have used the exact and complete form of the more refined Pitzer–Simonson–Clegg (PSC) ion-interaction approach for the investigation of electrolyte in mixed ...
Farzad Deyhimi, Zohreh Karimzadeh
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Correlation of pitzer ion interaction parameters

Korean Journal of Chemical Engineering, 1991
A new correlation predicting the activity coefficients of aqueous electrolyte solutions between Pitzer ion interaction parameters and ionc properties (ionic charge, radius and entropy) is developed. The substances include uni-uni and uni-bi type of single salts for which data are available.
Hee-Taik Kim, Seong-Youl Bae, Kyong-Ok Yoo   +2 more
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pH buffer assessment and Pitzer’s equations

Accreditation and Quality Assurance, 2011
Traceable measurement of the quantity pH in media outside the limits of the recent IUPAC recommendation requires an alternative to the Bates–Guggenheim convention. The Pitzer’s approach to ion interactions is widely appraised and offers a suitable approach to the estimation of single-ion activity coefficients.
Petra Spitzer, Paola Fisicaro, Guenther Meinrath, Daniela Stoica   +3 more
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Activity Coefficients of Sodium Chloride in Water–Ethanol Mixtures: A Comparative Study of Pitzer and Pitzer–Simonson Models

Journal of Solution Chemistry, 2001
Activity coefficients of NaCl were determined in water–ethanol solvents, in the range 5–20% (w/w) ethanol, from emf data. The molalities varied from 0.1 mol-kg−1 to near saturation and measurements were taken in the temperature range 25–50°C. The Pitzer model was used to describe the nonideal behavior of the electrolyte and the corresponding ...
A. Lopes, F. Farelo, M. I. A. Ferra
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Thermodynamic models based on Pitzer-NRTL and Pitzer-Margules equations for the extraction of tungstic acid with primary amine N1923

Science China Technological Sciences, 2015
The thermodynamic model of the extraction of W with primary amine under near neutral conditions is reported in this paper. The activity coefficients of the nonelectrolytes in organic phase are calculated by the Margules and NRTL equations which are based on previously tested liquid-liquid extraction equilibrium data in combination with mass balances ...
Xiao Lin, PengGe Ning, WeiFeng Xu, HongBin Cao, Yi Zhang   +4 more
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Pitzer, Modified Pitzer, and Extended Debye–Hückel Modeling Approaches: Ternary RbF or CsF + Glycine + Water Electrolyte Systems at 298.15 K

Journal of Chemical & Engineering Data, 2012
This article deals with the mean activity coefficients of RbF or CsF in the glycine + water mixed systems. The Pitzer, the modified Pitzer, and the extended Debye–Huckel equations are used to describe the nonideal behavior of the electrolyte. The osmotic coefficients, the excess Gibbs free energy, and the standard Gibbs energies of transfer were ...
Lei Ma, Shuni Li, Quanguo Zhai, Yucheng Jiang, Mancheng Hu   +4 more
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SIT Parameters for 1:1 Electrolytes and Correlation with Pitzer Coefficients

Journal of Solution Chemistry, 2006
The empirical parameters of a two-parameter SIT equation were determined for some 1:1 electrolytes: chlorides, bromides, iodides, nitrates, perchlorates and carboxylates of alkali metals, inorganic acids and bases, and tetralkylammonium halides. A wide range of ionic strengths were considered.
BRETTI, CLEMENTE, FOTI, Claudia, PORCINO, NUNZIATINA, SAMMARTANO, Silvio   +3 more
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Study on the salting effect of di(2-ethylhexyl) phosphoric acid in MCl2(MSO4) solutions by Pitzer-Li and Pitzer equations

Fluid Phase Equilibria, 1992
Abstract Lu, J.-F., Niu, S.-F. and Li, Y.-G., 1992. Study on the salting effect of di(2-ethylhexyl) phosphoric acid in MCl2(MSO4) solutions by Pitzer-Li and Pitzer equations. Fluid Phase Equilibria, 71: 211-224. The radioisotope (32P) technique is used to measure the solubility of di(2-ethylhexyl) phosphoric acid (D2EHPA) in MCl2 and MSO4 solutions.
Jiu-Fang Lu, Shu-Fang Niu, Yi-Gui Li
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Plutonium disproportionation: Pitzer parameters or precipitates?

Journal of Radioanalytical and Nuclear Chemistry, 2004
The behavior of dissolved pentavalent plutonium in the presence of hydrous plutonium oxides has recently been described in terms of Pitzer parameters. The observations can be explained by a conventional approach. The alternative perspective does not use the irreversible oxygen/water couple and it is easier to understand than virial expansions and ...
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