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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Strontium formate with Strontium chloride and Water
Components:
(1) Strontium chloride; SrCl2; [10476-95-4]
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:
Stoilova, D., Bulg. Chem. Commun. 25, 249-57 (1992).
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 Sr(CHO
2
)
2
-SrCl
2
-H
2
O system at 25 °C.
Chemical
1
Phase
Mass Fraction w
1
m
1
[mol kg-1]
a
Chemical
2
Mass Fraction w
2
m
2
[mol kg-1]
a
Solid Phase(s)
b
Sr(CHO2)2
Liquid
11.95
0.764
SrCl2
----
----
A
Sr(CHO2)2
Liquid
9.13
0.647
SrCl2
11.50
0.914
A
Sr(CHO2)2
Liquid
7.55
0.606
SrCl2
22.30
2.005
A
Sr(CHO2)2
Liquid
5.41
0.489
SrCl2
32.37
3.282
A
Sr(CHO2)2
Liquid
6.00
0.560
SrCl2
33.69
3.524
eutonic
Sr(CHO2)2
Liquid
5.98
0.563
SrCl2
34.20
3.607
eutonic
Sr(CHO2)2
Liquid
3.50
0.319
SrCl2
34.70
3.542
B
Sr(CHO2)2
Liquid
----
----
SrCl2
36.69
3.656
B
Notes:
a
The molality values were calculated by the compilers.
b
The solid phases are: A = Sr(CHO
2
)
2
•2H
2
O; B = SrCl
2
•6H
2
O.
Method/Apparatus/Procedure:
The method used was the isothermal decrease of supersaturation. Equilibrium was reached in 10-15 h. The strontium content was determined complexometrically. The chloride ion content was determined volumetrically by the Mohr method. The strontium formate concentration was estimated by difference. The composition of the ideally suction-dried solid phase was determined by the Schreinemakers method. X-ray diffraction and DT analysis were also used.
Source and Purity of Materials:
The strontium chloride was p.a. grade (Merck). The strontium formate was prepared by the reaction of dilute formic acid with strontium oxide, carbonate or hydroxide all of which were p.a. grade (Merck or Fluka).
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.