In the case of the single-ion activity coefficient equation suggested by Pitzer, this could be termed the “Pitzer” scale The equations for ln γi and ln aw which are
Activities EQ
30 sept 2019 · The purpose of this work was to study if the Pitzer model could be used in order to study the pure electrolytes and predict the behaviour in
master Post Outi
ionic radii to estimate the activity coefficients of salt mixtures by a Monte Carlo Simulation procedure Simplifying the Pitzer Equation for the Osmotic Coefficient
values of pH, individual-ion activities and individual-ion activity coefficients The Pitzer treatment of the aqueous model is based largely on the equations as
report
19 nov 2014 · the Pitzer ion interaction parameters are disregarded and the system properties are calculated using Equation (15) All activity coefficient
j AQU
The activity coefficient of each aqueous species is not independent Pitzer's equations are based on a semi-theoretical (see Pitzer 1973) interpretation ...
30-Sept-2019 Keywords activity coefficient Pitzer model
equations as incorporated in PHRQPITZ program limitations and instructions for use. PITZER EQUATIONS. The osmotic coefficient
With the ion-interaction (Pitzer) equations including the theoretical terms 18 Baumgarten
The experimental data was modeled by utilizing the modified Pitzer equation and the activity coefficient ratio of PEG was evaluated by using Maxwell's cross
And the activity coefficient #i o f components in the liquid phase can be calculated by Clegg-Pitzer equation. For Kent-Eisenberg the.
http://pubs.rsc.org/En/content/articlepdf/1978/f1/f19787400837
19-Nov-2014 the Pitzer ion interaction parameters are disregarded and the system properties are calculated using Equation (15). All activity coefficient ...
We have correlated simultaneously experimental data for osmotic and activity coefficients of strong electrolyte solutions using the Pitzer equation and a
version of the Pitzer equation Finally the activity coef?cient ratio of glycine was determined based on the Maxwell equation Keywords Activity coef?cient · Amino acids · Ion-selective electrodes · Mixed electrolyte solutions · Modi?ed Pitzer equation Nomenclature EI Potential difference in the presence of NaCl
The standard form of the Pitzer activity coefficient equation (PACE) (Pitzer 1973; Pitzer and Mayorga 1973; Pitzer and Kim 1974; Pitzer 1975; Pitzer 1991) will be used as implemented in the aqueous speciation code EQ3/6 version 8 0a (Wolery and Jarek 2003) with Aq> set to 0 392 at 25 °C
With the advent of activity coefficient models of practical usage in concentrated solutions (mostly based on Pitzer’s 1973 1975 equations) there has been a movement away from this particular and severe approximation
PITZER ION-INTERACTION PARAMETERS FOR ACTINIDES The first work on modeling the aqueous solution thermodynamics of actin-ide species using Pitzer’s equations was done by Pitzer and Mayorga [s) This original work included model parameters for hexavalent uranyl (UO~+) with Cl- C1O; and NO; and tetravalent Th4+ with Cl- and NO; In
What is the Pitzer model of nonideality?
THERMODYNAMIC MODELING Pitzer model The Pitzer model was applied for the treatment of non-ideality and in the case of 1-1 electrolyte the osmotic coefficient ? of the solution and mean activity coefficient ?±of the electrolyte can be written as:
What is the Pitzer model for 1-1 electrolyte?
The Pitzer model was applied for the treatment of non-ideality and in the case of 1-1 electrolyte the osmotic coefficient ? of the solution and mean activity coefficient ?±of the electrolyte can be written as:
Does Pitzer's model predict the isopiestic me-asurements of water activity?
298.15 in this study using the values of Pitzer's model, Table 3, predict exactly the same values determined experimentally by Platford (1975), the isopiestic me- asurements of water activity in recent study by Yang
What is the standard deviation of the Pitzer model?
The standard deviation, ?,was defined as: (47) where NPrepresents the number of experimental points at each temperature. The values of ion-interaction parameters for the thermodynamic models are presented in Table 3. The variation of MX b1for the Pitzer model depends on a1 and bbecause c1 is very small: (48)
3. Activity Coefficients of Aqueous Species 3.1. Introduction