ABSTRACT

Vapor-liquid equilibrium data (water activity, vapor pressure, osmotic coefficient, and activity coefficient) of binary aqueous sodium dihydrogen citrate or disodium hydrogen citrate solutions were obtained through the isopiestic method at T = 298.15 K. Density and speed of sound measurements were carried out on the aqueous solutions of the mentioned electrolytes at T = (288.15 to 308.15) K at atmospheric pressure. From the experimental density and speed of sound data, the apparent molar volume and isentropic compressibility values were evaluated and fitted to the Pitzer equation from which the apparent molar volume and apparent molar isentropic compressibility of the solutions at infinite dilution were calculated at each temperature within the above-mentioned range.

Compounds

#	Formula	Name
1	C6H6Na2O7	disodium hydrogen citrate
2	C6H7NaO7	sodium dihydrogen citrate
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.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1 3	Osmotic coefficient ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	32
POMD	1 3	(Relative) activity - 3 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	isopiestic	32
POMD	1 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	135
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	135
POMD	3 2	Osmotic coefficient ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	11
POMD	3 2	(Relative) activity - 3 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	isopiestic	11
POMD	3 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	140
POMD	3 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	140

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Vapor-Liquid Equilibria, Density, and Speed of Sound of Aqueous Solutions of Sodium Dihydrogen Citrate or Disodium Hydrogen Citrate

Sadeghi, R.[Rahmat], Golabiazar, R.[Roonak], Parsi, E.[Elham]

ABSTRACT