In this research, the thermodynamic properties of KCl in (N,N-dimethylformamide+water) mixed solvent using the potentiometric method were reported. The electromotive force measurements were carried out by using self-made electrodes on the galvanic cell of type: Ag|AgCl|KCl (m), N,N-dimethylformamide (wt%), H2O (1-wt) %|K-ISE, in various mass fractions of N,N-dimethylformamide in water (0, 10, 20, and 30)% on the molality ranging from 0.0094 to 2.5200 mol.kg-1 at T = (298.2 and 308.2) K and P = 0.1 MPa. Thermodynamic properties modeling were implemented by using the Debye-Huckel extended equation, Pitzer ion interaction and Pitzer-Simonson-Clegg models. Then, unknown parameters for each model were determined and utilized to calculate the thermodynamic properties such as the mean activity coefficients, the osmotic coefficients, the excess Gibbs free energy and the solvent activity for under investigated system. 1. Introduction There is a growing interest in the determination of thermodynamic properties of electrolytes in multicomponent mixtures containing both electrolytes and non-electrolytes. Electrolyte solutions are involved in several chemical, biological, biochemicals, geological and industrial processes such as seawater desalination and solvent extraction.1,2 Damage prevention of industrial equipment and environmental worries require the accurate thermodynamic knowledge of electrolytes during a process. In addition, introducing some organic solvents into electrolyte solutions can change the physicochemical properties of reference solutions, which can be very ACS Paragon Plus Environment Page 2 of 37
Compounds
#
Formula
Name
1
ClK
potassium chloride
2
C3H7NO
dimethylformamide
3
H2O
water
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.