IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Barium formate with Yttrium formate and 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
   (3) Yttrium formate; Y(CHO2)3; [15331-71-2]  NIST Chemistry WebBook for detail

Original Measurements:
   Portnova, S.M.; Krassilov, Yu. I.; Kuznetzov, N.T.; Balakaeva, I.V., Zh. Neorg. Khim. 35, 237-41 (1990).

Variables:

   Concentration = Composition at 25 ºC

Prepared By:
   Chr. Balarew and St. Trendafilova

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

Solubility values in the Ba(CHO₂)₂-Y(CHO₂)₃-H₂O system at 25 °C.
Chemical₁	Phase	Mass Fraction w₁	m₁ [mol kg-1]^a	Chemical₂	Mass Fraction w₂	m₂ [mol kg-1]^a	Solid Phase(s)^b
Ba(CHO2)2	Liquid	---	---	Y(CHO2)3	21.41	1.216	A
Ba(CHO2)2	Liquid	5.47	0.311	Y(CHO2)3	17.19	0.992	A
Ba(CHO2)2	Liquid	8.56	0.506	Y(CHO2)3	17.12	1.029	A
Ba(CHO2)2	Liquid	12.43	0.764	Y(CHO2)3	16.06	1.003	A
Ba(CHO2)2	Liquid	14.24	0.900	Y(CHO2)3	16.20	1.040	A
Ba(CHO2)2	Liquid	16.54	1.097	Y(CHO2)3	17.17	1.156	A
Ba(CHO2)2	Liquid	16.24	1.066	Y(CHO2)3	16.74	1.115	A
Ba(CHO2)2	Liquid	11.22	0.686	Y(CHO2)3	16.90	1.050	A+B
Ba(CHO2)2	Liquid	12.74	0.765	Y(CHO2)3	14.06	0.858	B
Ba(CHO2)2	Liquid	13.49	0.800	Y(CHO2)3	12.38	0.746	B
Ba(CHO2)2	Liquid	14.24	0.846	Y(CHO2)3	11.72	0.707	B
Ba(CHO2)2	Liquid	15.23	0.906	Y(CHO2)3	10.88	0.657	B
Ba(CHO2)2	Liquid	17.17	1.018	Y(CHO2)3	8.66	0.521	B
Ba(CHO2)2	Liquid	19.12	1.144	Y(CHO2)3	7.36	0.447	B
Ba(CHO2)2	Liquid	24.18	1.509	Y(CHO2)3	5.34	0.338	B
Ba(CHO2)2	Liquid	23.94	1.483	Y(CHO2)3	5.06	0.318	B
Ba(CHO2)2	Liquid	24.37	1.517	Y(CHO2)3	4.99	0.315	B
Ba(CHO2)2	Liquid	24.34	1.514	Y(CHO2)3	4.98	0.315	B+C
Ba(CHO2)2	Liquid	24.37	1.582	Y(CHO2)3	7.87	0.519	C
Ba(CHO2)2	Liquid	24.00	1.454	Y(CHO2)3	3.41	0.210	C
Ba(CHO2)2	Liquid	24.18	1.448	Y(CHO2)3	2.39	0.145	C
Ba(CHO2)2	Liquid	23.72	1.389	Y(CHO2)3	1.17	0.070	C
Ba(CHO2)2	Liquid	23.88	1.393	Y(CHO2)3	0.71	0.042	C

Notes:
   ^a  The molality values were calculated by the compilers.
   ^b  The solid phases are: A = Y(CHO₂)₃•2H₂O; B = BaY(CHO₂)₅•2H₂O; C = Ba(CHO₂)₂.

Method/Apparatus/Procedure:
   The isothermal method was used. Four weeks were allowed for equilibration. The Y³⁺ content was determined complexometrically. The Ba²⁺ content was determined gravimetrically as BaSO₄ after the Y³⁺ was bound with EDTA. The composition of the solid phases was determined by the Schreinemakers method, by DT analysis and by x-ray fluorescence spectroscopy.

Source and Purity of Materials:
   The formates were obtained by neutralizing dilute formic acid with p.a. grade yttrium or barium oxides.

Estimated Errors:
   Solubility: No information given.
   Temperature: No information given.