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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Calcium formate with Formic acid and Water
Components:
(1) Calcium formate; Ca(CHO2)2; [544-17-2]
NIST Chemistry WebBook
for detail
(2) Formic acid; CH2O2; [64-18-6]
NIST Chemistry WebBook
for detail
(3) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Dunn, L.J.; Philip, J.C., J. Chem. Soc. 658 (1934).
Variables:
Concentration = Composition at 25 ºC
Prepared By:
T. A. Ageyeva
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition of saturated solutions at 25ºC.
Chemical
1
Mass Fraction w
1
10
0
* Mole Fraction
1
a
Chemical
2
Mass Fraction w
2
Mole Fraction
2
a
Chemical
3
Mass Fraction w
3
a
Mole Fraction
3
a
Solid Phase(s)
CH2O2
0.0
0.0
Ca(CHO2)2
14.43
2.28
H2O
85.57
97.72
Ca(CHO2)2
CH2O2
18.48
9.24
Ca(CHO2)2
12.11
2.14
H2O
69.41
88.62
Ca(CHO2)2
CH2O2
27.41
14.56
Ca(CHO2)2
11.16
2.10
H2O
61.43
83.34
Ca(CHO2)2
CH2O2
36.31
20.57
Ca(CHO2)2
10.20
2.04
H2O
53.49
77.39
Ca(CHO2)2
CH2O2
53.30
34.60
Ca(CHO2)2
8.42
1.93
H2O
38.28
63.47
Ca(CHO2)2
CH2O2
61.60
43.09
Ca(CHO2)2
7.60
1.88
H2O
30.80
55.03
Ca(CHO2)2
CH2O2
69.90
53.08
Ca(CHO2)2
6.86
1.84
H2O
23.24
45.08
Ca(CHO2)2
CH2O2
85.40
77.12
Ca(CHO2)2
5.43
1.74
H2O
9.17
21.14
Ca(CHO2)2
Notes:
a
These values were calculated by the compiler.
Method/Apparatus/Procedure:
The isothermal method was used. The calcium formate content was determined gravimetrically as calcium formate. The composition of the solid phases was determined by the Schreinemakers method.
Source and Purity of Materials:
The salt was prepared from pure formic acid and calcium carbonate, purity not specified. Commercial formic acid was used.
Estimated Errors:
Temperature: The temperature was controlled to within ± 0.01 °C. Nothing is said about the solubility values.