SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Ashton, F. W.; Houston, D. F.; Saylor, C. P.; J. Res. Natl. Bur. Stan. 11, 233-53 (1933).
Conditions:
Room Temp: 0 - 100 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal method was used. Samples were taken at 6 and 18 h, filtered into weighing bottles and weighed. They were then evaporated to dryness in an oven at 125 °C, cooled in a desiccator and weighed. From the weight of anhydrous salt thus obtained, the solubility in g/100 g $\ce{H2O}$ was calculated. The barium content was determined by dissolving a sample in sulfuric acid, concentrating it by evaporation, and the acid driven off. The residue was then ignited, cooled, and weighed as sulfate.
Sample Information:
- Commercial barium formate was recrystallized twice from aqueous solutions, dried at 125°C and stored in a desiccator. The calcium and strontium content is 0.05%.
Measurement Errors:
Mass concentration (m/v) (1): The solubility is ±0.1 g/100 g H2O.
System Components:
- Barium formate, $\ce{ Ba(CHO2)2 }$; [541-43-5] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ (°C) | 100w1 | g1/100 g H2O | m1 (mol/kg) a | Phase (s) () b |
|---|---|---|---|---|
| 0 | 20.8a | 26.2 | 1.15 | A |
| 10 | 21.9a | 28.0 | 1.23 | A |
| 20 | 23.0a | 29.9 | 1.32 | A |
| 30 | 24.2a | 31.9 | 1.40 | A |
| 40 | 25.4a | 34.0 | 1.50 | A |
| 50 | 26.6a | 36.3 | 1.60 | A |
| 60 | 27.9a | 38.6 | 1.70 | A |
| 70 | 29.2a | 41.3 | 1.82 | A |
| 80 | 30.7a | 44.2 | 1.94 | A |
| 90 | 32.3a | 47.6 | 2.09 | A |
| 100 | 33.9a | 51.3 | 2.26 | A |
(a) These values and the molality values were calculated by the compilers.
(b) The solid phase is: A = Ba(CHO2)2.
