SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Nadzharyan, K. A.; Itkina, L. S.; Lepeshkov, I. N.; Zh. Neorg. Khim. 25, 1676-9 (1980).
Conditions:
Room Temp: Composition at 50 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal method was used. The mixtures were placed in glass vessels in a thermostat and stirred mechanically. Equilibrium was reached in one and a half weeks. The barium content of both phases was determined gravimetrically as $\ce{BaSO4}$ in the presence of Complexon III [1]. The cadmium content was determined complexometrically. The composition of the solid phases was determined by Schreinemakers' method, IR spectroscopy, TG analysis and X-ray diffraction.
Sample Information:
- The barium formate was p.a. grade. The cadmium formate was prepared by the reaction of 85% formic acid with p.a. grade $\ce{CdCO3}$. Both formates were recrystallized twice from a 1% formic acid solution.
Measurement Errors:
Ambient temperature: Not given.
Methodology Citation
1 Pribil, R.; Maricova, D.; Chem. Listy 46, 542 (1952).
System Components:
- Barium formate, $\ce{ Ba(CHO2)2 }$; [541-43-5] NIST WebBook
- Cadmium formate, $\ce{ Cd(CHO2)2 }$; [4464-23-7] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| 100w2 | 100w1 | m2 (mol/kg) a | m1 (mol/kg) b | Phase (s) () b |
|---|---|---|---|---|
| 27.77 | - | 1.899 | - | A |
| 25.34 | 3.73 | 1.765 | 0.231 | A |
| 25.11 | 5.70 | 1.793 | 0.362 | A + B |
| 23.82 | 5.53 | 1.665 | 0.344 | B |
| 17.54 | 6.82 | 1.145 | 0.396 | B |
| 12.96 | 8.36 | 0.814 | 0.467 | B |
| 8.30 | 12.10 | 0.515 | 0.668 | B |
| 2.65 | 19.83 | 0.169 | 1.125 | B |
| 1.54 | 26.88 | 0.106 | 1.651 | B |
| 1.27 | 27.00 | 0.087 | 1.655 | B + C |
| - | 26.83 | - | 1.612 | C |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = Cd(CHO2)2·2H2O; B = CdBa(CHO2)4·2H2O; C = Ba(CHO2)2.
