The Property And Preparation of Manganese Oxide Mn2O3 Powder

Manganese Oxide: The Property
Manganese oxide has a chemical formula Mn2O3. Its molecular weight of 157.88 is also known as. It’s a black cubic crystal having a relative density of 4.50. Manganese dioxide is insoluble with water, acetic and ammonium chlorine solutions, but can be easily dissolved by other inorganic acid.

In cold hydrochloric Acid, manganese oxide forms a brown solution. This solution is then transformed into a red solution by hot dilute sulfuric and concentrated sulfuric acids. Manganese nitrate and MnO2 are decomposed in hot acid and hot nitric acids. The heat releases oxygen and Mn3O4 becomes molybdenum. You can find it in the following forms: –Mn2O3 & –Mn2O3.

Methods for Preparing Manganese Oxide

The preparation of -Mn2O3
You can further alter or reduce Mn2O3 by using manganese dioxide, or heat divalent manganese salt at 600 to 800°C. To maintain a constant mass, you can also heat pure MnO2 at 650°C. Manganese nitrate Hexahydrate can be used as a raw materials. It must first be heated at at least 190°C to form a solid. Next, crush the material and heat at at least 650°C.

The preparation of -Mn2O3
To make -MnO(OH), 350mL were of a solution with 2.2g of manganese. By heating, the thickening suspension emitting oxygen in dark brown to black color is rapidly boiled. Once the mixture has been boiled for approximately 4 minutes, it is separated and washed with 1.5L boiling water. Then, dry it with phosphorus pentoxide. To produce Mn2O3, the MnO (OH) was dehydrated carefully at 250°C and under low pressure for 3 days. Additionally, you can heat –MnO2 at 500°C under reduced pressure for up to 78 hours in order to make –Mn2O3.

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