IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Calcium formate with Formic acid and Water

   (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).


   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.
Chemical1Mass Fraction w1100 * Mole Fraction1aChemical2Mass Fraction w2Mole Fraction2aChemical3Mass Fraction w3aMole Fraction3aSolid Phase(s)
CH2O2  0.0  0.0Ca(CHO2)214.432.28H2O85.5797.72Ca(CHO2)2
CH2O218.48  9.24Ca(CHO2)212.112.14H2O69.4188.62Ca(CHO2)2
CH2O253.3034.60Ca(CHO2)2  8.421.93H2O38.2863.47Ca(CHO2)2
CH2O261.6043.09Ca(CHO2)2  7.601.88H2O30.8055.03Ca(CHO2)2
CH2O269.9053.08Ca(CHO2)2  6.861.84H2O23.2445.08Ca(CHO2)2
CH2O285.4077.12Ca(CHO2)2  5.431.74H2O  9.1721.14Ca(CHO2)2
   a  These values were calculated by the compiler.

   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.