ABSTRACT

Electrolytic conductivities of some sodium salts (NaI, NaSCN, CH3COONa) have been studied in 0, 25, 50 and 75 mass% ethane-1,2-diol +methyl alcohol mixtures at 293.15, 298.15 and 303.15 K. The limiting molar conductivity ( .), the association constant (KA) and the distance of closest approach of ion (R) have been evaluated using the Fuoss conductance equation (1978). The association constant (KA) decreases with temperature while it tends to decrease in the order: 0 mass% greater than 25 mass% greater than 50 mass% greater than 75 mass% ethane- 1,2-diol +methyl alcohol mixtures. Thermodynamic parameters H., G. and S. along with theWalden products ( . ) are obtained and discussed. The results have been interpreted in terms of ion.solvent interactions and structural changes in the mixed solvents.

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
2	CH4O	methanol
3	CNNaS	sodium thiocyanate
4	INa	sodium iodide
5	C2H3NaO2	sodium ethanoate

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.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2 1	Viscosity, Pa*s ; Liquid	Mass fraction - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	12
POMD	2 1	Relative permittivity at zero frequency ; Liquid	Mass fraction - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Parallel plate capacitor	12
POMD	2 1	Mass density, kg/m3 ; Liquid	Mass fraction - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	12
POMD	2 3	Molar conductivity, S*m2/mol ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 3; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	45
POMD	2 4	Molar conductivity, S*m2/mol ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	45
POMD	2 5	Molar conductivity, S*m2/mol ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 5; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	48
POMD	2 1 3	Molar conductivity, S*m2/mol ; Liquid	Solvent: Mass fraction - 1; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 3; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	135
POMD	2 1 4	Molar conductivity, S*m2/mol ; Liquid	Solvent: Mass fraction - 1; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 4; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	135
POMD	2 1 5	Molar conductivity, S*m2/mol ; Liquid	Solvent: Mass fraction - 1; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 5; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	135

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Study on ion solvent interactions of alkali metal salts in pure methanol and its binary mixtures with ethane-1,2-diol by a conductometric technique

Roy, M. N.[Mahendra Nath], Pradhan, P.[Prasanna], Dewan, R.[Rajani]

ABSTRACT