SDS Volume (4795)
Volume 73. Metal and Ammonium Formate Systems, p None
Original Measurements
Hampshire, C. H.; Pratt, W. R.; Pharm. J. (London) 91, 138 (1913).
Variables:
Room Temp: 17 - 33.5 °C
Prepared by:
St. Trendafilova, St. Tepavitcharova
Method/Apparatus/Procedure:
Water and an excess of the crystallized salt were stirred in the apparatus described by Lumsden [1]. The formic acid content was determined by the method of Jones [2]. Iron was determined by direct ignition and weighed as the oxide.
Source and Purity of Materials:
- The salt was prepared by dissolving ferric hydroxide in 50% $\ce{CH2O2}$ (d = 1.124) on a water bath, evaporating down, and cooling [3].
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1
Lumsden, J. C.; J. Chem. Soc. 81, 355 (1902).
2
Jones, H. C.; Amer. Chem. Journ. 17, 539 (1895).
3
Bellini; Arch. Pharm. 247, 423 (1909).
Components:
- Ferric hydroxide formate, $\ce{ Fe3(CHO2)7(OH)2.4H2O }$; [111195-22-5] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility of ferric formate in water.
| $T$ (°C) | 100w1 | g1/100 g H2O | m1 (mol/kg) | Phase (s) () |
|---|---|---|---|---|
| 17 | 5.05 | 5.32 | 0.11 | A |
| 20 | 5.24 | 5.53 | 0.12 | A |
| 22 | 5.32 | 5.62 | 0.12 | A |
| 24 | 5.40 | 5.71 | 0.12 | A |
| 25.5 | 5.81 | 6.17 | 0.13 | A |
| 27 | 6.09 | 6.49 | 0.14 | A |
| 29 | 6.33 | 6.76 | 0.14 | A |
| 33.5 | 6.71 | 7.19 | 0.15 | A |
(a) These values were calculated by the compilers.
(b) The solid phase is: A = Fe3(CHO2)7(OH)2ยท4H2O.
