SDS Volume (4728)
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 strontium 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:
- Strontium formate, $\ce{ Sr(CHO2)2 }$; [592-89-2] 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 | 12.52 | 87.48 | 0.0 | 1.43 | 98.57 | A |
| 18.01 | 13.30 | 68.69 | 9.15 | 1.75 | 89.10 | A |
| 34.24 | 14.17 | 51.59 | 20.18 | 2.16 | 77.66 | A |
| 41.50 | 15.28 | 43.22 | 26.62 | 2.54 | 70.84 | A |
| 48.00 | 16.40 | 35.60 | 33.52 | 2.97 | 63.51 | A |
| 53.40 | 18.27 | 28.33 | 40.92 | 3.63 | 55.45 | A |
| 57.30 | 20.07 | 22.63 | 47.63 | 4.32 | 48.05 | B |
| 61.50 | 20.51 | 17.99 | 54.54 | 4.71 | 40.75 | B |
| 63.30 | 20.74 | 15.96 | 57.84 | 4.91 | 37.25 | B |
| 64.70 | 20.94 | 14.36 | 61.65 | 4.94 | 33.41 | B |
| 70.50 | 22.04 | 7.46 | 74.01 | 5.99 | 20.0 | C |
| 72.30 | 22.54 | 5.16 | 79.19 | 6.39 | 14.43 | C |
| 74.30 | 23.03 | 2.67 | 85.32 | 6.85 | 7.83 | C |
(a) These values were calculated by the compiler.
(b) The solid phases are: A = Sr(CHO2)2·2H2O; B = Sr(CHO2)2; C = 2Sr(CHO2)2·CH2O2.
