IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Copper(II)formate with Formic acid
Components:
   (1) Formic acid; CH2O2; [64-18-6]  NIST Chemistry WebBook for detail
   (2) Copper(II) formate; Cu(CHO2)2; [544-19-4]  NIST Chemistry WebBook for detail
Original Measurements:
   Davidson, A.W.; Holm, V., J. Am. Chem. Soc. 53, 1350 (1931).

 Variables:
   Temperature = 308 K, 315 K, 322 K and 325 K

 Prepared By:
   T. A. Ageyeva

 Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)   
Solubility of copper(II)formate in formic acid
t/°C100 * Mole Fraction1
250.004 (a)
350.0045
420.0048
490.0066
520.0075
 Notes:
   a  This value was determined by extrapolation. The solid phase could not be obtained in sufficient quantity for analysis.

 Method/Apparatus/Procedure:
   The solubility values were measured by using the freezing point method.

 Source and Purity of Materials:
   The copper salt was formed by dissolving the basic carbonate in 50% formic acid, and heating to expel the CO2. Crystals separated as the mixture cooled. The crystals were pressed between porous tiles and dried at 348 K for 10 hours; the purity is not specified. Formic acid was prepared by treating 90% formic acid with B2O3 and distilling in vacuo; melting point = 281.5-281.7 K.

 Estimated Errors:
   Solubility: No information is given.
   Temperature: The temperature was controlled to within ± 0.5 K.

 References:
   1A. W. Davidson and W. H. McAllister, J. Am. Chem. S. 52, 507 (1930).