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Basic knowledge of manganese dioxide

wallpapers Industry 2021-04-02
Overview of manganese dioxide
Manganese dioxide is an amphoteric oxide. It is a very stable black powdery solid at room temperature and can be used as a depolarizer for dry batteries. Manganese dioxide is insoluble in water. It has a melting point of 535°C and a density of 5.03g/cm3. It is often used in the laboratory for its oxidizing property and concentrated HCl to produce chlorine.
The chemical properties of manganese dioxide
Manganese dioxide is a strong oxidant in acidic media.Manganese dioxide has an octahedral structure. The oxygen atoms are on the corners of the octahedrons, and the manganese atoms are in the octahedrons. The octahedrons are connected to form a single or double chain. The octahedron is either hexagonal close-packed or square close-packed.
Manganese dioxide is a kind of amphoteric oxide, which is oxidizing when it meets a reducing agent. In the case of strong oxidants, it is also reductive. Manganese dioxide does not burn by itself, but it supports combustion and should not be placed with flammable materials.
Application field of manganese dioxide
Used as a depolarizer for dry batteries, a catalyst, and oxidant in the synthesis industry, a coloring agent, a decolorizer, and an iron removal agent in the glass industry and enamel industry. Used in the manufacture of metal manganese, special alloys, ferromanganese castings, gas masks, and electronic material ferrites, etc. In addition, it can also be used in the rubber industry to increase the viscosity of rubber. It can also be used as a catalyst in chemical experiments.
Laboratory uses of manganese dioxide
Used as a catalyst for the decomposition of hydrogen peroxide to produce oxygen.
Used as a catalyst when heating potassium chlorate to decompose to produce oxygen.
It reacts with elemental aluminum powder to produce manganese by a thermite reaction.
Used as pigments, yellow glass, etc.
React with hot concentrated hydrochloric acid to produce chlorine.
It reacts with molten caustic potassium (potassium hydroxide) in the air to produce potassium manganate.
In the decomposition reaction of potassium permanganate, manganese dioxide acts as a self-catalyst for potassium permanganate.
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