Carbon powder color Potassium Permanganate and the same color of manganese dioxide
Potassium Permanganate is not the same, purple black solid, black manganese dioxide is both solid, oxidizing, Potassium Permanganate, Potassium Permanganate can dissolve in water, but you can put the Potassium Permanganate manganese dioxide is not soluble in water, you can see it.
Manganese dioxide is a black orthorhombic crystal or brownish black powder. Relative density 5.026. Insoluble in water and nitric acid, soluble in acetone. Brown solution and cold hydrochloric acid reaction of high manganese chloride, the chlorine released from heated and formed in hydrogen chloride, heated to 200 degrees Celsius, generating three two and four three manganese oxide manganese oxide. To produce manganese sulfate in the concentrated sulfuric acid. Generation of manganate and caustic soda and oxidant eutectic. With sulfur heating, the formation of sulfur dioxide and manganese sulfide. Reduction of manganese to carbon at high temperature. 420 DEG C decomposition deoxidization, the formation of low manganese oxides
Physicochemical propertiesPotassium Permanganate (KMnO4) English Potassium permanganate red purple orthorhombic, granular or acicular crystal. Metallic luster. Relative density 2.703. Soluble in aqueous solution of deep purple red, slightly soluble in methanol, acetone and sulfuric acid. Decomposition of ethanol and hydrogen peroxide. Heating up to 240 degrees Celsius or above. Strong oxidizing agent, reduced to Mn2+ in acidic medium, reduced to manganese dioxide in alkaline or neutral medium, and manganese dioxide produced by Mn2+. Contact with concentrated sulfuric acid is prone to explosion, in the case of cooling, with high concentration of sulfuric acid precipitation of high manganese anhydride black green oily liquid. Contact with organic matter, friction, collision, due to the heat emitted oxygen will cause combustion.
