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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Cadmium formate with Water
Components:
(1) Cadmium formate; Cd(CHO2)2; [4464-23-7]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Ashton, F.W.; Houston, D.F.; Saylor, C.P., J. Res. Nat. Bur. Stand. 11, 233-53 (1933).
Variables:
Temperature = 0 ºC to 100 ºC
Prepared By:
Chr. Balarew and St. Trendafilova
Experimental Remarks:
The molality values were calculated by the compilers.
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility of cadmium formate in water
t/°C
g
1
/g
2
Phase
Mass Fraction w
1
m
1
[mol kg-1]
Solid Phase(s)
a
0
8.4
Liquid
7.8
0.42
A
10
11.1
Liquid
9.99
0.548
A
20
14.4
Liquid
12.6
0.711
A
30
18.6
Liquid
15.7
0.919
A
40
25.4
Liquid
20.3
1.26
A
50
38.5
Liquid
27.8
1.90
A
60
59.5
Liquid
37.3
2.94
A
66
75.5
Liquid
43.0
3.73
A
70
77.0
Liquid
43.5
3.80
B
80
80.5
Liquid
44.6
3.98
B
90
85.2
Liquid
46.0
4.21
B
100
94.6
Liquid
48.6
4.67
B
Notes:
a
The solid phases are: A = Cd(CHO
2
)
2
•2H
2
O; B = Cd(CHO
2
)
2
.
Method/Apparatus/Procedure:
The isothermal method was used. Samples were taken at 6 and 18 h, filtered into weighing bottles and weighed. They were then evaporated in an oven at 125 °C, cooled in a desiccator and reweighed. From the weight of anhydrous salt the solubility in g/100g H
2
O was calculated.
Source and Purity of Materials:
An aqueous solution of commercial cadmium formate was heated on a steam bath. A precipitate, which contained iron, was filtered off, and the salt was recrystallized twice from a weak formic acid solution. It was dried at 105 °C and stored in a desiccator. The dihydrate was then prepared by recrystallization at room temperature from a 1% formic acid solution. The anhydrous salt was obtained by another recrystallization at 70-75 °C.
Estimated Errors:
Solubility: ± 0.1 g/100 g H
2
O.