IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Barium formate with Formic acid

Components:
   (1) Barium formate; Ba(CHO2)2; [541-43-5]  NIST Chemistry WebBook for detail
   (2) Formic acid; CH2O2; [64-18-6]  NIST Chemistry WebBook for detail

Original Measurements:
   Kendall, J.; Adler, H., J. Am. Chem. Soc. 43, 1470 (1921).

Variables:
   Temperature = -4.9 ºC to 31.8 ºC

Prepared By:
   T. A. Ageyeva

Experimental Data:   (Notes on the Nomenclature)

The solubility of barium formate in formic acid.
t/°C	10⁰ * Mole Fraction₁	Solid Phase(s)
8.4	0.0	CH2O2
7.2	0.91	CH2O2
6.1	1.74	CH2O2
5.1	2.30	CH2O2
2.6	3.73	CH2O2
0.5	4.67	CH2O2
-0.3	5.12	CH2O2
-4.9	6.95	CH2O2
9.5	8.52	Ba(CHO2)2•CH2O2
15.5	8.86	Ba(CHO2)2•CH2O2
19.0	9.23	Ba(CHO2)2•CH2O2
24.9	9.83	Ba(CHO2)2•CH2O2
26.5	10.03	Ba(CHO2)2•CH2O2
31.8	10.75	Ba(CHO2)2•CH2O2

Method/Apparatus/Procedure:
   The only information given is that the solubility values were measured by the freezing point method.

Source and Purity of Materials:
   The barium salt was prepared by dissolving a pure sample of the carbonate in 90% formic acid. The salt obtained was recrystallized 3 times from water and dried to constant weight at 413 K; purity is not specified. The formic acid was prepared by treating a c.p. product with B₂O₃. It was then distilled in vacuo until a product melting above 281.6 K was obtained.

Estimated Errors:

   Temperature: Nothing is specified.