Compilation - Copper(II) formate with Water (IUPAC SDS Volume 73)
SDS Volume (4780)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Stoilova, D.; Balarew, C.; Vassileva, V.; Comm. Dept. Chem. Bulg. Acad. Sci. 18, 3 (1985).
Variables:
Room Temp: 10 - 70 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The method used was the isothermal decrease of supersaturation, under stirring, for 15-20 hrs. The $\ce{Cu^{2+}}$ content of the liquid and solid phases was determined complexometrically using Complexon III at pH 5.5-6.0 and Xylenol Orange as indicators.
Source and Purity of Materials:
- Analytical Reagent grade substances were used. The copper formate was obtained by neutralizing formic acid solutions with basic copper carbonate.
Estimated Errors:
Mass concentration (m/v) (1): The solubility of the salt is determined in a slight excess of formic acid (about 2%) to suppress salt hydrolysis.
Components:
- Copper formate, $\ce{ Cu(CHO2)2 }$; [544-19-4] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility polytherm of copper formate in water.
| $T$ (°C) | 100w1 | m1 (mol/kg) | Phase (s) () |
|---|---|---|---|
| 10 | 5.58 | 0.385 | A |
| 15 | 6.49 | 0.452 | A |
| 20 | 7.03 | 0.492 | A |
| 25 | 8.80 | 0.628 | A |
| 30 | 11.06 | 0.810 | A |
| 35 | 14.23 | 1.080 | A |
| 40 | 18.52 | 1.480 | A |
| 45 | 21.71 | 1.806 | B |
| 50 | 25.17 | 2.190 | B |
| 55 | 27.34 | 2.450 | B |
| 60 | 27.48 | 2.467 | C |
| 65 | 28.05 | 2.539 | C |
| 70 | 28.50 | 2.595 | C |
(a) These values were calculated by the compilers.
(b) The solid phases are: A = Cu(CHO2)2·4H2O, B = Cu(CHO2)2·2H2O, C = Cu(CHO2)2.
