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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Calcium formate with Water
Components:
(1) Calcium formate; Ca(CHO2)2; [544-17-2]
NIST Chemistry WebBook
for detail
(2) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Krasnitzki, E. R.,Monatsh. Chem. 8, 595 (1887).
Variables:
Temperature = 0.8 ºC to 80.5 ºC.
Prepared By:
Chr.Balarew
Experimental Remarks:
The molality values were calculated by the compilers.
Authors' Comment:
The solubility data (g/100g H
2
O) are the mean values obtained by the cooling and by the heating method.
Experimental Data:
(Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Solubility of calcium 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
16.28
Liquid
14.00
1.251
A
15.5
16.72
Liquid
14.32
1.284
A
26.3
17.04
Liquid
14.55
1.309
A
39.7
17.36
Liquid
14.79
1.334
A
56.6
17.70
Liquid
15.03
1.359
A
76.0
17.99
Liquid
15.24
1.382
A
80.5
18.07
Liquid
15.30
1.388
A
Notes:
a
The solid phase is: A = Ca(CHO
2
)
2
.
Method/Apparatus/Procedure:
The apparatus and method were described earlier.
1
The mixtures were shaken for 1-1.5 h. Dilute sulfuric acid was added to a weighed sample. The mixture was evaporated on a water bath. The remaining sulfuric acid was driven off by heating to constant weight of calcium sulfate.
Source and Purity of Materials:
Calcium carbonate, obtained by heating calcium oxalate, was dissolved in formic acid. The crystals were recrystallized and analyzed.
Estimated Errors:
Solubility: ± 0.04 g/100 g water.
References:
1
Raupenstrauch, Monatsh. Chem.
6
, 563 (1885).