Activity coefficient of aqueous sodium bicarbonate

“…Likewise, the tables of activities and osmotic coefficients generated by Hamer et al 28 , Goldberg et al [24][25][26][27] Therefore, based on the high accuracy of the methods to estimate the osmotic coefficients as well as the high reliability of the sources of information used in this work, it appears that the impact of the uncertainty of the data in the correlation accuracy is low. 8,9,10,16,23,10,34 . Finally, Table 1 includes the classification of each ion in terms of its effects on the structure of water, which can be either by increasing the stability of the waterwater interactions (structure makers or kosmotropes) or by disrupting it (structure breakers or chaotropes).…”

Section: Correlation Accuracy Relative To the Uncertainty Of The Datamentioning

confidence: 99%

Estimation of the Pitzer Parameters for 1–1, 2–1, 3–1, 4–1, and 2–2 Single Electrolytes at 25 °C

et al. 2016

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The Pitzer model is one of the most important thermodynamic models to predict the behavior of aqueous electrolyte solutions, especially at high ionic strengths. However, most of the parameters in the Pitzer equations have to be obtained experimentally and this represents an important drawback to this model. Therefore, in order to make the Pitzer equations less dependent on experimental data and more dependent on the properties of the solution, new equations that correlate the Pitzer equations with the properties of the solution have been successfully developed for 1-1, 2-1, 3-1, 4-1 and 2-2 electrolytes. In particular, these equations were developed for two cases: (i) considers the original Pitzer equations and (ii) considers some simplifications to the Pitzer equation (assuming C  B and  ). In particular, for case (ii), the second virial coefficients B and Bof the Pitzer equations were re-estimated using published experimental data of the osmotic coefficient obtained from the literature. As a conclusion, both the simplified and the original Pitzer equations presented a very good match with this published experimental data for the osmotic coefficients.Additionally, the second virial coefficients B and B for both cases were successfully correlated with the ionic radius and the ionic charge, and this is confirmed by the very high coefficients of determination achieved (R 2 >0.96). However, these new equations are valid only to cases in which no significant ion association occurs, which is also the basic premise of the original Pitzer model.

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“…Thermodynamic models such as EQ3NR use logK values at p = 0 and provide their own ionic-strength corrections. Experimentally derived activity coefficients we^e used to correct the measured values of logK to p = 0 (Robinson and 5tok.es 1959;Pitzer and Peiper 1980;Khoo et al . 1981;and Peiper and Pitzer 1332).…”

Section: Problem Areasmentioning

confidence: 99%

Proceedings of the workshop on geochemical modeling

Steefel

1990

Geochimica et Cosmochimica Acta

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Activity coefficient of aqueous sodium bicarbonate

Cited by 43 publications

References 1 publication

Thermodynamics of aqueous carbonate solutions including mixtures of sodium carbonate, bicarbonate, and chloride

Thermodynamics of aqueous carbonate solutions including mixtures of sodium carbonate, bicarbonate, and chloride

Estimation of the Pitzer Parameters for 1–1, 2–1, 3–1, 4–1, and 2–2 Single Electrolytes at 25 °C

Proceedings of the workshop on geochemical modeling

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