Formula Mn(NO3)2 Density 1.54 g/cm³ | Molar mass 178.95 g/mol Appearance white powder | |
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Manganese(II) nitrate is an inorganic compound with formula Mn(NO3)2. Each formula unit is composed of one Mn2+ cation and two NO3− anions and varying amounts of water. Most common is the tetrahydrate Mn(NO3)2·4H2O, but mono- and hexahydrates are also known as well as the anhydrous compound. Some of these compounds are useful precursors to the oxides of manganese.
Contents
Preparation
Manganese(II) nitrate can be prepared by dissolving manganese(II) carbonate in dilute nitric acid:
MnCO3 + 2 HNO3 → Mn(NO3)2 + H2O + CO2It can also be prepared from manganese dioxide and nitrogen dioxide.
Properties
On heating to 300°C, aqueous solutions of manganese(II) nitrate thermally decompose to form MnO2 and NO2 as products. Upon further heating, the MnO2 loses oxygen to form Mn2O3 and eventually Mn3O4.
References
Manganese(II) nitrate Wikipedia(Text) CC BY-SA