SDS Volume (4659)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Stoilova, D.; Bulg. Chem. Commun. 25, 249-57 (1992).
Variables:
Room Temp: Composition at 25 °C
Prepared by:
St. Trendafilova, Chr. Balarew
Method/Apparatus/Procedure:
The method used was the isothermal decrease of supersaturation. Equilibrium was reached in 10-15 h. The barium content was determined complexometrically. The chloride ion content was determined volumetrically by the Mohr method. The barium formate concentration was estimated by difference. The composition of the ideally suction-dried solid phase was determined by the Schreinemakers method. X-ray diffraction and DT analysis were also used.
Source and Purity of Materials:
- The barium chloride was p.a. grade (Merck). The barium formate was prepared by the reaction of dilute formic acid with barium oxide, carbonate or hydroxide all of which were p.a. grade (Merck or Fluka).
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
Components:
- Barium formate, $\ce{ Ba(CHO2)2 }$; [541-43-5] NIST WebBook
- Barium chloride, $\ce{ BaCl2 }$; [10361-37-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility values in the Ba(CHO2)2-BaCl2-H2O system at 25°C.
| 100w1 | 100w2 | m1 (mol/kg) | m2 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 23.48 | - | 1.343 | - | A |
| 20.48 | 7.75 | 1.249 | 0.519 | A |
| 17.50 | 18.18 | 1.191 | 1.357 | A |
| 17.33 | 24.26 | 1.303 | 1.994 | A |
| 16.86 | 24.39 | 1.256 | 1.994 | Eutonic |
| 16.81 | 23.98 | 1.243 | 1.945 | Eutonic |
| 12.85 | 24.58 | 0.899 | 1.886 | B |
| 9.97 | 25.21 | 0.673 | 1.868 | B |
| 4.93 | 26.33 | 0.314 | 1.839 | B |
| 1.59 | 26.79 | 0.097 | 1.796 | B |
| - | 27.11 | - | 1.786 | B |
(a) The molality values were calculated by the compilers.
(b) The solid phases are: A = Ba(CHO2)2; B = BaCl2ยท2H2O.
