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Manganese(II) nitrate is the precursor to manganese(II) carbonate (MnCO 3), which is used in fertilizers and as a colourant. The advantage of this method, based on the use of ammonia ( NH 3 ) and carbon dioxide (CO 2 ) as reaction intermediates, being that the side product ammonium nitrate ( NH 4 NO 3 ) is also useful as a fertilizer.
The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).
Manganese(II) sulfate usually refers to the inorganic compound with the formula MnSO 4 ·H 2 O. This pale pink deliquescent solid is a commercially significant manganese(II) salt. Approximately 260,000 tonnes of manganese(II) sulfate were produced worldwide in 2005. It is the precursor to manganese metal and many other chemical compounds.
Hydrogen cyanide: Gas HCN 130.5 Hydrogen bromide: Liquid HBr −36.3 Hydrogen chloride: Gas HCl −92.30 Hydrogen chloride: Aqueous HCl −167.2 Hydrogen fluoride: Gas HF −273.3 Hydrogen iodide: Gas HI 26.5 Iodine: Solid I 2: 0 Iodine: Gas I 2: 62.438 Iodine: Aqueous I 2: 23 Iodide ion Aqueous I −: −55 Iron: Solid Fe 0 Iron carbide Solid ...
Excess molten sodamide at 240 °C reduces manganese oxides to nitrides, with the final product dependent on stoichiometry, through the following reaction. 3 Mn 2 O 3 + 9 NaNH 2 → 2 Mn 3 N 2 + 9 NaOH + N 2 + 3 NH 3. The waste sodium hydroxide selectively dissolves in an aqueous ethanol wash. [7] Manganocene ammonolyzes at 700 °C to give Mn 3 ...
It is prepared commercially by reduction of MnO 2 with hydrogen, carbon monoxide or methane, e.g.: [2] MnO 2 + H 2 → MnO + H 2 O MnO 2 + CO → MnO + CO 2. Upon heating to 450 °C, manganese(II) nitrate gives a mixture of oxides, MnO 2−x, which can be reduced to the monoxide with hydrogen at ≥750 °C. [6]
A pyrotechnic composition is a substance or mixture of substances designed to produce an effect by heat, light, sound, gas/smoke or a combination of these, as a result of non-detonative self-sustaining exothermic chemical reactions. Pyrotechnic substances do not rely on oxygen from external sources to sustain the reaction.
A particularly common oxidation state for manganese in aqueous solution is +2, which has a pale pink color. Many manganese(II) compounds are known, such as the aquo complexes derived from manganese(II) sulfate (MnSO 4) and manganese(II) chloride (MnCl 2). This oxidation state is also seen in the mineral rhodochrosite (manganese(II) carbonate ...