Definition of MnO2. Meaning of MnO2. Synonyms of MnO2

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Definition of MnO2

MnO2
Manganese Man`ga*nese", n. [F. mangan[`e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See Magnet, and cf. Magnesia.] (Chem.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8. Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel. Black oxide of manganese, Manganese dioxide or peroxide, or Black manganese (Chem.), a heavy black powder MnO2, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; -- called also familiarly manganese. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass. Manganese bronze, an alloy made by adding from one to two per cent of manganese to the copper and zinc used in brass.

Meaning of MnO2 from wikipedia

- two electrodes. The MnO2 dissolves, enters solution as the sulfate, and is deposited on the anode. The important reactions of MnO 2 are ****ociated with...
- hydroxides containing Mn (III,IV), such as MnOOH and MnO2. Soil pH and oxidation-reduction conditions affect which of these three forms of Mn is dominant in...
- 2 H2O → 2 NaMnO4 + MnO2 + 4 NaOH They are produced commercially by electrolysis or air oxidation of alkaline solutions of manganate salts (MnO2− 4). Permanganate...
- pot****ium manganate: 2 MnO2 + 4 KOH + O2 → 2 K2MnO4 + 2 H2O With sodium hydroxide, the end product is not sodium manganate but an Mn(V) compound, which is...
- from the electrochemical reaction between zinc (Zn) and manganese dioxide (MnO2) in the presence of an ammonium chloride (NH4Cl) electrolyte. It produces...
- secondary types. Alkaline batteries contain zinc (Zn) and manganese dioxide (MnO2), which is a ****ulative neurotoxin and can be toxic in higher concentrations...
- medium MnO−4 can not accept 5 electrons to form Mn2+. Instead, it accepts only 3 electrons and forms solid MnO2 by the following reaction: MnO−4 + 4 H+...
- electron on the Mn(VI) center. The industrial route entails treatment of MnO2 with air and pot****ium hydroxide: 2 MnO2 + 4 KOH + O2 → 2 K2MnO4 + 2 H2O...
- upon oxidation. MnO2 + H+ (C+) + e− ⇌ MnOOH(C) The second mechanism is based on the surface adsorption of electrolyte cations on MnO2. (MnO2)surface + C+...
- methane, e.g.: MnO2 + H2 → MnO + H2O MnO2 + CO → MnO + CO2 Upon heating to 450 °C, manganese(II) nitrate gives a mixture of oxides, denoted MnO2−x, which can...