Components:
(1) Copper formate,
Cu(CHO2)2; [544-19-4]
NIST WebBook
(2) Formic acid,
CH2O2; [64-18-6]
NIST WebBook
Original Measurements
Davidson, A. W.; Holm, V.; J. Am. Chem. Soc. 53, 1350 (1931).
Variables:
Ambient temperature: 308 K, 315 K, 322 and 325 K
Prepared by:
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:
Ambient temperature: The temperature was controlled to within ±0.5 K.
Mass concentration (m/v) (1): No information is given.
References
1 Davidson, A. W.; McAllister, W. H.; J. Am. Chem. Soc. 52, 507 (1930).
Experimental Values:
Solubility of copper(II)formate in formic acid
| T (°C) | 100x1 |
|---|---|
| 25.0 | 4 x 10-3 |
| 35.0 | 4.5 x 10-3 |
| 42.0 | 4.8 x 10-3 |
| 49.0 | 6.6 x 10-3 |
| 52.0 | 7.5 x 10-3 |
(a) This value was determined by extrapolation. The solid phase could not be obtained in sufficient quantity for analysis.
