IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Strontium formate with Formic acid and Water

Components:
   (1) Formic acid; CH2O2; [64-18-6]  NIST Chemistry WebBook for detail
   (2) Strontium formate; Sr(CHO2)2; [592-89-2]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Balashova, I.M.; Storonkin, A.B.; Susarev, M.P., Zh. Fiz. Khim. 41, 2393 (1967).

Variables:

   Concentration = Composition at 298.2 K, 308.2 K and 323.2 K

Prepared By:
   T. A. Ageyeva

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

Solubility in the Sr(CHO₂)₂-CH₂O₂-H₂O system.
T/K	Chemical₁	Mass Fraction w₁	10⁰ * Mole Fraction₁^a	Chemical₂	Mass Fraction w₂	Mole Fraction₂^a	Chemical₃	Mass Fraction w₃	Mole Fraction₃^a	Solid Phase(s)^b
298.2 K	CH2O2	0.00	0.00	Sr(CHO2)2	12.34	1.81	H2O	87.66	96.19	A
298.2 K	CH2O2	10.58	5.05	Sr(CHO2)2	12.86	1.59	H2O	76.56	93.36	A
298.2 K	CH2O2	16.42	8.20	Sr(CHO2)2	12.96	1.68	H2O	70.62	90.12	A
298.2 K	CH2O2	18.34	9.32	Sr(CHO2)2	13.13	1.73	H2O	68.53	88.95	A
298.2 K	CH2O2	28.22	15.16	Sr(CHO2)2	13.69	1.97	H2O	58.09	82.37	A
298.2 K	CH2O2	34.46	20.37	Sr(CHO2)2	14.24	2.18	H2O	51.30	77.45	A
298.2 K	CH2O2	40.53	25.62	Sr(CHO2)2	14.93	2.45	H2O	44.54	71.93	A
298.2 K	CH2O2	51.00	32.41	Sr(CHO2)2	17.10	2.82	H2O	31.90	64.77	A
298.2 K	CH2O2	52.72	39.98	Sr(CHO2)2	18.13	3.56	H2O	29.15	56.46	A
298.2 K	CH2O2	55.18	44.41	Sr(CHO2)2	19.79	4.13	H2O	25.03	51.46	A + B
298.2 K	CH2O2	55.80	45.27	Sr(CHO2)2	19.80	4.16	H2O	24.40	50.57	B
298.2 K	CH2O2	57.45	47.55	Sr(CHO2)2	19.75	4.24	H2O	22.80	48.21	B
298.2 K	CH2O2	58.33	49.05	Sr(CHO2)2	19.98	4.36	H2O	21.69	46.59	B
298.2 K	CH2O2	59.28	50.60	Sr(CHO2)2	20.10	4.44	H2O	20.62	44.96	B
298.2 K	CH2O2	61.75	54.71	Sr(CHO2)2	20.30	4.66	H2O	17.95	40.63	B
298.2 K	CH2O2	62.80	56.60	Sr(CHO2)2	20.42	4.77	H2O	16.78	38.63	B
298.2 K	CH2O2	63.90	58.64	Sr(CHO2)2	21.65	5.15	H2O	15.45	36.21	B
298.2 K	CH2O2	66.70	64.55	Sr(CHO2)2	21.10	5.29	H2O	12.20	30.16	B
298.2 K	CH2O2	70.05	72.51	Sr(CHO2)2	22.87	6.13	H2O	8.08	21.36	B + C
298.2 K	CH2O2	71.67	77.05	Sr(CHO2)2	23.34	6.50	H2O	5.99	16.45	C
298.2 K	CH2O2	73.93	82.05	Sr(CHO2)2	23.08	6.64	H2O	3.99	11.31	C
298.2 K	CH2O2	75.95	91.83	Sr(CHO2)2	23.82	7.46	H2O	0.23	0.71	C
308.2 K	CH2O2	0.0	0.0	Sr(CHO2)2	14.17	1.65	H2O	85.83	98.35	A
308.2 K	CH2O2	11.93	5.86	Sr(CHO2)2	14.54	1.85	H2O	73.53	92.29	A
308.2 K	CH2O2	21.55	11.47	Sr(CHO2)2	14.82	2.04	H2O	63.63	86.49	A
308.2 K	CH2O2	29.40	16.82	Sr(CHO2)2	15.22	2.26	H2O	55.38	90.92	A
308.2 K	CH2O2	38.90	24.58	Sr(CHO2)2	16.00	2.62	H2O	45.10	72.80	A
308.2 K	CH2O2	44.95	30.58	Sr(CHO2)2	16.80	2.96	H2O	38.25	66.46	A
308.2 K	CH2O2	50.00	36.92	Sr(CHO2)2	18.42	3.52	H2O	31.58	59.56	A
308.2 K	CH2O2	50.60	37.88	Sr(CHO2)2	18.82	3.65	H2O	30.58	58.47	A + B
308.2 K	CH2O2	51.90	39.53	Sr(CHO2)2	18.94	3.74	H2O	29.16	56.73	B
308.2 K	CH2O2	55.32	44.04	Sr(CHO2)2	19.10	3.94	H2O	25.58	52.02	B
308.2 K	CH2O2	59.86	50.49	Sr(CHO2)2	19.10	4.17	H2O	21.04	45.34	B
308.2 K	CH2O2	62.75	55.18	Sr(CHO2)2	19.25	4.39	H2O	18.00	40.43	B
308.2 K	CH2O2	68.50	66.60	Sr(CHO2)2	20.09	5.06	H2O	11.41	28.34	B
308.2 K	CH2O2	71.21	73.84	Sr(CHO2)2	21.05	5.66	H2O	7.74	20.50	B
308.2 K	CH2O2	71.52	74.34	Sr(CHO2)2	20.94	5.64	H2O	7.54	20.02	B + C
308.2 K	CH2O2	72.40	76.08	Sr(CHO2)2	20.80	5.66	H2O	6.80	18.26	C
308.2 K	CH2O2	75.26	84.81	Sr(CHO2)2	21.66	6.32	H2O	3.08	8.87	C
308.2 K	CH2O2	77.36	92.95	Sr(CHO2)2	22.64	7.05	H2O	0.0	0.0	C
323.2 K	CH2O2	0.0	0.0	Sr(CHO2)2	17.32	2.08	H2O	82.68	97.92	A
323.2 K	CH2O2	12.41	6.32	Sr(CHO2)2	17.37	2.29	H2O	70.22	91.39	A
323.2 K	CH2O2	23.55	13.18	Sr(CHO2)2	17.52	2.54	H2O	58.93	84.27	A
323.2 K	CH2O2	24.04	13.51	Sr(CHO2)2	17.46	2.54	H2O	58.50	83.95	A
323.2 K	CH2O2	30.10	17.93	Sr(CHO2)2	17.78	2.75	H2O	52.12	79.32	A
323.2 K	CH2O2	32.52	19.87	Sr(CHO2)2	17.98	2.85	H2O	49.50	77.28	A
323.2 K	CH2O2	36.05	22.03	Sr(CHO2)2	18.25	3.00	H2O	45.70	71.35	A
323.2 K	CH2O2	39.20	25.86	Sr(CHO2)2	18.70	3.20	H2O	42.10	70.94	A
323.2 K	CH2O2	38.60	26.28	Sr(CHO2)2	18.82	3.24	H2O	41.58	70.48	A + B
323.2 K	CH2O2	40.04	26.62	Sr(CHO2)2	18.64	3.21	H2O	41.32	70.17	B
323.2 K	CH2O2	45.82	32.19	Sr(CHO2)2	18.25	3.32	H2O	35.93	64.49	B
323.2 K	CH2O2	46.34	32.83	Sr(CHO2)2	18.41	3.38	H2O	35.25	63.79	B
323.2 K	CH2O2	46.53	33.01	Sr(CHO2)2	18.37	3.38	H2O	35.10	63.61	B
323.2 K	CH2O2	54.60	42.23	Sr(CHO2)2	17.98	3.60	H2O	27.42	54.17	B
323.2 K	CH2O2	59.64	49.16	Sr(CHO2)2	18.04	3.85	H2O	22.32	46.99	B
323.2 K	CH2O2	68.30	63.86	Sr(CHO2)2	18.44	4.47	H2O	13.26	31.67	B
323.2 K	CH2O2	73.77	76.29	Sr(CHO2)2	19.20	5.14	H2O	7.03	18.57	B
323.2 K	CH2O2	74.53	78.35	Sr(CHO2)2	19.37	5.27	H2O	6.10	16.38	B + C
323.2 K	CH2O2	75.00	79.68	Sr(CHO2)2	19.49	5.36	H2O	5.51	14.95	C
323.2 K	CH2O2	77.58	87.56	Sr(CHO2)2	20.15	5.89	H2O	2.27	6.54	C
323.2 K	CH2O2	79.40	93.70	Sr(CHO2)2	20.60	6.30	H2O	0.0	0.0	C

Notes:
   ^a  These values were calculated by the compiler.
   ^b  The solid phases are: A = Sr(CHO₂)₂•2H₂O; B = Sr(CHO₂)₂; C = Sr(CHO₂)₂•0.5CH₂O₂.

Method/Apparatus/Procedure:
   The isothermal method was used. The strontium formate content was determined gravimetrically, and the formic acid content by titration with 0.1 N KOH. The composition of the solid phase was determined by the Schreinemakers method.

Source and Purity of Materials:
   The salt was prepared by reaction of formic acid with strontium carbonate. The salt was recrystallized 3 times and then dried to constant weight; purity not specified. The formic acid was prepared by double distillation and then frozen several times; d²⁰₄ = 1.2200 and n²⁰_D = 1.3714. The water was doubly distilled.

Estimated Errors: