Home > Manganese (IV) oxide

A green substance was obtained after about 10 minutes when melting manganese oxide with an alkaline salt and adding oxidizing agents like saltpeter ( sodium nitrate Na N O₃) or potassium perchlorate ( K Cl O₄). This substance dissolves in cold water, giving a dark green color. Potassium manganate ( K₂ MnO₄), a salt in dark green crystalized rombic prisms (dark green), was formed after vacuum distillingVacuum distillation is a method of distillation whereby the pressure above the solution to be distilled is reduced to less than one Atmosphere (unit) causing evaporation of the most volatile liquid(s) (those with the lowest boiling points. Vacuum distilla with a metal "finish". Potassium manganate is soluble in lyeLye is an alternative name for the chemicals sodium hydroxide ( soda lye) or (less commonly) potassium hydroxide ( potash lye). Lye is used to make soap. ONLY, otherwise it will disproportionate into potassium permanganatePotassium permanganate KMnO is a strong oxidizing agent. Its proper IUPAC name is Potassium manganate (VII). It is also known as "permanganate of potash" and "Condy's crystals". The molecular weight of potassium permanganate is 158. As a solid, it forms d (KMnO₄^-) and manganese oxide (MnO₂).

Potassium manganate is converted into potassium permaganate in aqueous acidic solution:

3MnO₄^2- + 4H⁺ → 2MnO₄^- + MnO₂) + 2H₂O

MnO₄(-) has a purple color

MnO₄(2-) has a green color

MnO₂ is used as a catalystEnthalpy profile for catalysed and uncatalysed reactions. A is the activation energy for an uncatalysed reaction, A is the reduced activation energy for the same reaction when catalysed. I represents the point at which a chemical intermediate has been for in the laboratory preparation of oxygen from potassium chloratePotassium chlorate is a compound containing potassium, chlorine and oxygen. Formula: KClO Melting point: 368°C Used as: # An oxidizing agent. A disinfectant / bleach. Explosives / Fireworks. Potassium chlorate should be handled with care. It reacts vigoro, one of the classical experiments of elementary chemistry classes. The procedure consists of merely heating potassium chlorate and manganese dioxide together in a hard glass container and collecting the gas over water. See oxygen, manganese and potassium chlorate for precautions.

Eighteenth-century British chemists referred to MnO₂ simply as manganese. Elemental manganese was known as reglus of manganese.

Ancient cave painters sometimes used MnO₂ as black paint.

Manganese Oxide is also known for its catalytic properties producing oxygen when mixed with hydrogen peroxide. This is the type of reaction that drives the famous Jet-packs.