Iron(II) hydroxide
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| Iron(II) hydroxide | |
|---|---|
| Image:Iron(II) hydroxide.jpg | |
| Systematic name | Iron(II) hydroxide |
| Other names | xxx, xxx |
| Molecular formula | Fe(OH)2 |
| Molar mass | ~90 g/mol |
| Density | x.xxx g/cm3 |
| Solubility (water) | x.xx g/l |
| Melting point | xx.x °C |
| Boiling point | xx.x °C |
| CAS number | [xx-xx-xx] |
| Disclaimer and references | |
Iron(II) hydroxide or ferrous hydroxide is an insoluble compound produced when iron(II) ions, from a compound such as iron (II) sulfate react with hydroxide ions. Iron(II) hydroxide itself is practically white, but even traces of oxygen impart it with a greenish tinge. If the solution was not deoxygenated and the iron reduced, the precipitate can vary in color starting from green to reddish brown depending on the iron(III) content. In the presence of oxygen the color changes quickly.
Iron(II) hydroxide might be produced from iron(II) sulfate and hydroxide ions (from a soluble compound containing hydroxide ion) in this reaction:
FeSO4 + 2OH− → Fe(OH)2 + SO42−
[edit] Uses
Ferrous hydroxide has been investigated as a method for the removal of toxic selenate and selenite ions from water systems such as wetlands. The ferrous hydroxide reduces these ions to elemental selenium, which is insoluble in water and precipitates out.[1]
[edit] References
- ^ Zingaro, Ralph A., et al. (1997). "Reduction of oxoselenium anions by iron(II) hydroxide". Environment International 23 (3): 299–304. DOI:10.1016/S0160-4120(97)00032-9.
[edit] External links
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