Compilation - Cadmium formate with Water (IUPAC SDS Volume 73)
SDS Volume (4783)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Nadzhafyan, K. A.; Kaganskii, I. M.; Stamikosto, E. V.; Erayser, L. N.; Skulskaya, E. I.; Zh. Neorg. Khim. 34, 2152 (1989).
Variables:
Room Temp: 20.05 - 50.05 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The isothermal and polythermal method were used [1]. Equilibrium was achieved in 1.5-2 weeks. The cadmium content was determined by complexometric titration using Eriochrome Black T as indicator. The solid phase was identified using Schreinemakers', spectroscopic , thermal and X-ray methods.
Source and Purity of Materials:
- $\ce{Cd(CHO2)2.2H2O}$ was prepared from CP grade cadmium carbonate and 85% formic acid. The product was recrystallised twice from 1% formic acid. Purity is not specified. The water is freshly distilled.
Estimated Errors:
Ambient temperature: The temperature was controlled to within ±1°C1
References
1 Nadzharyan, K. A.; Itkina, L. S.; Lepeshkov, I. N.; Zh. Neorg. Khim. 25, 1676-9 (1980).
Components:
- Cadmium formate, $\ce{ Cd(CHO2)2 }$; [4464-23-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility values in the Cd(CHO2)2-H2O system.
| $T$ (°C) | 100w1 | m1 (mol/kg) | Phase (s) () |
|---|---|---|---|
| 20.05 | 12.0 | 0.674 | A |
| 25.05 | 14.10 | 0.809 | A |
| 30.05 | 15.0 | 0.872 | A |
| 40.05 | 19.3 | 1.181 | A |
| 50.05 | 26.2 | 1.754 | A |
| 50.05 | 27.77 | 1.899 | A |
(a) These values were calculated by the compilers.
(b) The solid phase is: A = Cd(CHO2)2·2H2O.
(c) These values were determined using the isothermal method. The other values were obtained using the polythermal method.
