ABSTRACT

Molar conductivities, ?, of dilute aqueous solutions (c = (?3*10-4 to ?5*10-3) mol*dm-3) of sodium formate, potassium formate, and formic acid in the temperature range T = (278.15 to 313.15) K are reported. The experimental data are examined by applying the Quint-Viallard conductivity equations and the Debye-Hckel equations for activity coefficients. Limiting conductivities of formate anion in the investigated temperature range were obtained from the data for salts, and then the dissociation constants for formic acid were estimated. Results were compared with the available literature data.

Compounds

#	Formula	Name
1	CH2O2	formic acid
2	CHNaO2	sodium methanoate
3	CHKO2	potassium formate
4	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 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:12	2
POMD	1 4	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	88
POMD	2 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	2
POMD	2 4	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 2; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	144
POMD	3 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	VIBTUB:UFactor:6	2
POMD	3 4	Molar conductivity, S*m2/mol ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Alternating current cell with electrodes	88

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

Dilute Aqueous Solutions with Formate Ions: A Conductometric Study

Boncina, M.[Matjaz], Apelblat, A.[Alexander], Bester-Rogac, M.[Marija]

ABSTRACT