IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Barium formate with Water

Components:
   (1) Barium formate; Ba(CHO2)2; [541-43-5]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Ashton, F.W.; Houston, D.F.; Saylor, C.P., J. Res. Nat. Bur. Stand. 11, 233-53 (1933).

Variables:
   Temperature = 0 ºC to 100 ºC

Prepared By:
   Chr.Balarew and St. Trendafilova

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)

Solubility of barium formate in water.
t/°C	g₁/g₂	Phase	Mass Fraction w₁^a	m₁ [mol kg-1]	Solid Phase(s)^b
0	26.2	Liquid	20.8	1.15	A
10	28.0	Liquid	21.9	1.23	A
20	29.9	Liquid	23.0	1.32	A
30	31.9	Liquid	24.2	1.40	A
40	34.0	Liquid	25.4	1.50	A
50	36.3	Liquid	26.6	1.60	A
60	38.6	Liquid	27.9	1.70	A
70	41.3	Liquid	29.2	1.82	A
80	44.2	Liquid	30.7	1.94	A
90	47.6	Liquid	32.3	2.09	A
100	51.3	Liquid	33.9	2.26	A

Notes:
   ^a  These values and the molality values were calculated by the compilers.
   ^b  The solid phase is: A= Ba(CHO₂)₂.

Method/Apparatus/Procedure:
   The isothermal method was used. Samples were taken at 6 and 18 h, filtered into weighing bottles and weighed. They were then evaporated to dryness in an oven at 125 °C, cooled in a desiccator and weighed. From the weight of anhydrous salt thus obtained, the solubility in g/100 g H₂O was calculated. The barium content was determined by dissolving a sample in sulfuric acid, concentrating it by evaporation, and the acid driven off. The residue was then ignited, cooled, and weighed as sulfate.

Source and Purity of Materials:
   Commercial barium formate was recrystallized twice from aqueous solutions, dried at 125 °C and stored in a desiccator. The calcium and strontium content is 0.05%.

Estimated Errors:
   Solubility: The solubility is ±0.1 g/100 g H₂O.