SDS Volume (4729)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Dunn, L. J.; Philip, J. C.; J. Chem. Soc. 658 (1934).
Variables:
Room Temp: Composition at 25 °C
Prepared by:
Method/Apparatus/Procedure:
The isothermal method was used. The methods of analysis are not described. The composition of the solid phases was determined by the Schreinemakers method.
Source and Purity of Materials:
- The salt was prepared from pure formic acid and barium carbonate or hydroxide; purity is not specified. Commercial formic acid was used.
Estimated Errors:
Ambient temperature: The temperature was controlled to within ±0.01°C. Nothing is said about the solubility values.
Mass concentration (m/v) (1): No information is given.
Components:
- Barium formate, $\ce{ Ba(CHO2)2 }$; [541-43-5] NIST WebBook
- Formic acid, $\ce{ CH2O2 }$; [64-18-6] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Composition of saturated solutions at 25°C.
| 100w2 | 100w1 | 100w3 | $100 x_{2}$ | $100 x_{1}$ | $100 x_{3}$ | Phase (s) () |
|---|---|---|---|---|---|---|
| 0.0 | 23.51 | 76.49 | 0.0 | 2.38 | 97.62 | A |
| 5.39 | 24.25 | 70.36 | 2.83 | 2.59 | 94.58 | A |
| 10.57 | 25.03 | 64.40 | 5.86 | 2.89 | 91.25 | A |
| 15.41 | 25.72 | 58.87 | 9.01 | 3.05 | 87.94 | A |
| 22.43 | 26.87 | 50.70 | 14.25 | 3.46 | 82.29 | A |
| 22.38 | 26.09 | 51.53 | 14.05 | 3.32 | 82.63 | B |
| 28.49 | 24.71 | 46.80 | 18.86 | 3.27 | 78.11 | B |
| 38.07 | 23.11 | 38.82 | 26.83 | 3.30 | 69.87 | B |
| 47.50 | 22.56 | 29.94 | 36.95 | 3.56 | 59.49 | B |
| 58.40 | 23.45 | 18.15 | 53.33 | 4.34 | 42.33 | B |
| 65.80 | 25.72 | 8.48 | 71.00 | 5.63 | 23.37 | B |
(a) These values were calculated by the compiler.
(b) The solid phases are: A = Ba(CHO2)2; B = Ba(CHO2)2·CH2O2.
