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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Barium formate with Cadmium formate and Water
Components:
(1) Barium formate; Ba(CHO2)2; [541-43-5]
NIST Chemistry WebBook
for detail
(2) Cadmium formate; Cd(CHO2)2; [4464-23-7]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Nadzharyan, K.A.; Itkina, L.S.; Lepeshkov, I.N., Zh. Neorg. Khim. 25, 1676-9 (1980).
Variables:
Concentration = Composition at 50 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(CHO
2
)
2
-Cd(CHO
2
)
2
-H
2
O system at 50 °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
Cd(CHO2)2
Liquid
27.77
1.899
Ba(CHO2)2
---
---
A
Cd(CHO2)2
Liquid
25.34
1.765
Ba(CHO2)2
3.73
0.231
A
Cd(CHO2)2
Liquid
25.11
1.793
Ba(CHO2)2
5.70
0.362
A+B
Cd(CHO2)2
Liquid
23.82
1.665
Ba(CHO2)2
5.53
0.344
B
Cd(CHO2)2
Liquid
17.54
1.145
Ba(CHO2)2
6.82
0.396
B
Cd(CHO2)2
Liquid
12.96
0.814
Ba(CHO2)2
8.36
0.467
B
Cd(CHO2)2
Liquid
8.30
0.515
Ba(CHO2)2
12.10
0.668
B
Cd(CHO2)2
Liquid
2.65
0.169
Ba(CHO2)2
19.83
1.125
B
Cd(CHO2)2
Liquid
1.54
0.106
Ba(CHO2)2
26.88
1.651
B
Cd(CHO2)2
Liquid
1.27
0.087
Ba(CHO2)2
27.00
1.655
B+C
Cd(CHO2)2
Liquid
---
---
Ba(CHO2)2
26.83
1.612
C
Notes:
a
The molality values were calculated by the compilers.
b
The solid phases are: A = Cd(CHO
2
)
2
•2H
2
O; B = CdBa(CHO
2
)
4
•2H
2
O; C = Ba(CHO
2
)
2
.
Method/Apparatus/Procedure:
The isothermal method was used. The mixtures were placed in glass vessels in a thermostat and stirred mechanically. Equilibrium was reached in 1.5 weeks. The barium content of both phases was determined gravimetrically as BaSO
4
in the presence of Complexon III.
1
The cadmium content was determined complexometrically. The composition of the solid phases was determined by Schreinemakers' method, IR spectroscopy, TG analysis and x-ray diffraction.
Source and Purity of Materials:
The barium formate was p.a. grade. The cadmium formate was prepared by the reaction of 85% formic acid with p.a. grade CdCO
3
. Both formates were recrystallized twice from a 1% formic acid solution.
Estimated Errors:
Temperature: Not given.
References:
1
R. Pribil and D. Maricova, Chem. Listy
46
, 542 (1952).