SDS Volume
Volume 73. Metal and Ammonium Formate Systems, p None
Source Publication
Vasileva, V.; Karapetkova, A.; Bulg. Chem. Commun. 28, 151-9 (1995).
Conditions:
Room Temp: 10 - 80 °C
Compilers:
St. Trendafilova, Chr. Balarew
Methodology:
The isothermal solubility method was used. Equilibrium was reached in 5-7 hrs. in an argon atmosphere. $\ce{Fe^{2+}}$ was first oxidized to $\ce{Fe^{3+}}$ with $\ce{H2O2}$ and then determined complexometrically at pH 1.5 and sulfosalicylic acid as indicator. The solid phase composition was determined by the graphic method of Schreinemakers for wet residues [1]. X-ray diffraction analysis was also used.
Sample Information:
- Iron formate was prepared by dissolution of iron powder in dilute formic acid. All reagents were p.a. grade.
Methodology Citations
1
Schreinemakers, F. A. H.; Z. Phys. Chem. 55U, 73 (1906).
2
Schreinemakers, F. A. H.; Z. Phys. Chem. 11U, 76 (1893)
System Components:
- Iron(II) formate, $\ce{ Fe(CHO2)2 }$; [3047-59-4] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
| $T$ (°C) | 100w1 | m1 (mol/kg) a | Phase (s) () b |
|---|---|---|---|
| 10 | 3.48 | 0.247 | A |
| 15 | 3.72 | 0.264 | A |
| 20 | 4.05 | 0.289 | A |
| 30 | 4.41 | 0.316 | A |
| 35 | 4.65 | 0.334 | A |
| 40 | 4.85 | 0.349 | A |
| 45 | 5.08 | 0.362 | A |
| 50 | 5.22 | 0.377 | A |
| 55 | 5.50 | 0.398 | A |
| 60 | 5.70 | 0.414 | A |
| 65 | 5.89 | 0.429 | A |
| 70 | 6.12 | 0.447 | A |
| 75 | 6.27 | 0.458 | A |
| 80 | 6.50 | 0.476 | A |
(a) These values were calculated by the compilers.
(b) The solid phase is: A = Fe(CHO2)2ยท2H2O.
