The ternary system: H2O–Fe(NO3)3–Co(NO3)2 isotherms −15 and −25°C

Goundali, Bahija El; Kaddami, Mohammed

doi:10.1016/j.jallcom.2007.06.014

Cited by 6 publications

(10 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The saturation by ice is achieved, which generates a variation in the slope of the curve of solution conductivity versus concentration. At this point the freezing temperature and molality are determined (Goundali et al, 2008;Goundali et al, 2007). For example, to determine freezing depression points of the system H 2 O-A, we start with the sample M, Figure 1-B.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermodynamic Properties and Pitzer Parameter Determination for Orthophosphoric Acid From Freezing Point and Isopiestic Measurement Data

Bakher

Kaddami

2018

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

The freezing depression points of aqueous phosphoric acid have been determined using a method based on measurement of solution conductivity. The osmotic coefficient for freezing point lowering was calculated by the condition of solid-liquid equilibrium and by the equation proposed by Bjerrum (1918). A calculation method is presented in this study to evaluate the ion interaction parameters for the Pitzer model from freezing point and isopiestic molalities of aqueous phosphoric acid solution. The model of Chen, Bromely and the Three-Characteristic Parameter Correlation (TCPC) are also used to model this system. The isopiestic molality values from literature data are used to optimize these models. Using these parameters, we were able to estimate thermodynamic properties: osmotic coefficient, mean activity coefficient and water activity for the H 3 PO 4-H 2 O system, and contribution to a better understanding of the thermodynamic behaviour of the aqueous system containing phosphoric acid.

show abstract

Section: Experimental Methodsmentioning

confidence: 99%

Thermodynamic Properties and Pitzer Parameter Determination for Orthophosphoric Acid From Freezing Point and Isopiestic Measurement Data

Bakher

Kaddami

2018

Braz. J. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The second experimental set of methods gives the solubility of ice in the binary solution using, for example, the conductometric method. 6 The fundamental principles of both methods consist of reaching the solid−liquid equilibrium for a given solution. Thus, in the direct freezing point method at a given concentration the freezing temperature of the solution is measured using the conductometric method at a fixed temperature and looking for the saturation point of the solution by diluting a prepared solution of the salt with known concentration until a variation of the conductivity versus composition slope is observed.…”

Section: ■ Experimental Datamentioning

confidence: 99%

“…3−5 A recent series of work by Goundali el al. 6 have presented a new set of experimental data dealing with ferric nitrate in aqueous solutions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The present study determines the parameters values for the Pitzer model at temperatures below 273.15 K, based on the available literature data of ferric nitratewater solutions. 3,4,6 An important outcome of this work is a thermodynamic model able to represent accurately the aqueous solution properties at low temperatures, from its dilute regions up to the saturation of the salt, using only the available freezing point data and with the possibility of extension the model to temperatures higher than 273.15 K…”

Section: ■ Introductionmentioning

confidence: 99%

“…Only scattered data are available for trivalent metal nitrates. Jones et al have presented one of these rare pieces of data in several published papers and books. − A recent series of work by Goundali el al . have presented a new set of experimental data dealing with ferric nitrate in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of Pitzer Parameters for Ferric Nitrate from Freezing Point and Solubility of Ice

et al. 2015

View full text Add to dashboard Cite

A calculation method is presented in this work to evaluate the ion interaction parameters for the Pitzer model from freezing points of aqueous solutions of pure electrolytes and solubility. To show the reliability of this method, one system that was not covered by the open literature was chosen. Using a small number of experimental data we were able to determine Pitzer parameters for this system reaching a concentration up to 1.8 mol −1 kg −1 Using this set of parameters thermodynamic properties such as osmotic coefficient, water activity, and mean activity coefficient were estimated at low temperatures for ferric nitrate−water system.

show abstract

Solubility Modeling of the Binary Systems Fe(NO3)3–H2O, Co(NO3)2–H2O and the Ternary System Fe(NO3)3–Co(NO3)2–H2O with the Extended Universal Quasichemical (UNIQUAC) Model

et al. 2016

View full text Add to dashboard Cite

The ternary system: H2O–Fe(NO3)3–Co(NO3)2 isotherms −15 and −25°C

Cited by 6 publications

References 13 publications

Thermodynamic Properties and Pitzer Parameter Determination for Orthophosphoric Acid From Freezing Point and Isopiestic Measurement Data

Thermodynamic Properties and Pitzer Parameter Determination for Orthophosphoric Acid From Freezing Point and Isopiestic Measurement Data

Determination of Pitzer Parameters for Ferric Nitrate from Freezing Point and Solubility of Ice

Solubility Modeling of the Binary Systems Fe(NO3)3–H2O, Co(NO3)2–H2O and the Ternary System Fe(NO3)3–Co(NO3)2–H2O with the Extended Universal Quasichemical (UNIQUAC) Model

Contact Info

Product

Resources

About