ABSTRACT

Density, sound velocity and conductivity measurements are carried out on 1-heptyl-3-methylimidazolium bromide ([C7mim][Br]) in pure water and in aqueous solutions of sodium di-hydrogen citrate, di-sodium hydrogen citrate and tri-sodium citrate over a range of temperatures at atmospheric pressure. The experimental density and sound velocity data are used to calculate the apparent molar volume and isentropic compressibility as a function of temperature and concentration. The effects of temperature and charge on the anion of sodium citrate salts on the apparent molar volume and isentropic compressibility of [C7mim][Br] are studied. It was found that both of the apparent molar volume and isentropic compressibility of [C7mim][Br] in aqueous sodium citrate solutions are larger than those in pure water and increase by increasing temperature. The effects of temperature and charge on the anion of sodium citrate salts on the conductivity behavior of the investigated IL solutions are also studied.

Compounds

#	Formula	Name
1	C11H21BrN2	1-heptyl-3-methylimidazolium bromide
2	H2O	water
3	C6H7NaO7	sodium dihydrogen citrate
4	C6H6Na2O7	disodium hydrogen citrate
5	C6H5Na3O7	trisodium citrate

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	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Single path-length method	70
POMD	2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	70
POMD	2 3 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 3; Liquid	Liquid	Single path-length method	75
POMD	2 3 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 3; Liquid	Liquid	Vibrating tube method	75
POMD	2 3 1	Electrical conductivity, S/m ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	194
POMD	4 2 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Amount concentration (molarity), mol/dm3 - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	Alternating current cell with electrodes	84
POMD	4 2 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	Single path-length method	80
POMD	4 2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	Vibrating tube method	80
POMD	5 2 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 5; Liquid	Liquid	Alternating current cell with electrodes	76
POMD	5 2 1	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 5; Liquid	Liquid	Single path-length method	85
POMD	5 2 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 5; Liquid	Liquid	Vibrating tube method	85

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Effect of simple electrolytes on the thermodynamic properties of room temperature ionic liquids in aqueous solutions

Sadeghi, R.[Rahmat], Golabiazar, R.[Roonak], Shekaari, H.[Hemayat]

ABSTRACT