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...
- MnO2− 4. MnO− 4 + e− → MnO2− 4 In a neutral medium, however, it gets reduced to the brown +4 oxidation state of manganese dioxide MnO2. 2 H2O + MnO−...
- prin****lly as pyrolusite (MnO2), braunite, (Mn2+Mn3+6)(SiO12), psilomelane (Ba,H 2O) 2Mn 5O 10, and to a lesser extent as rhodochrosite (MnCO3). The most important...
- pot****ium manganate: 2 MnO2 + 4 KOH + O22 K2MnO4 + 2 H2O (With sodium hydroxide, the end product is not sodium manganate but an Mn(V) compound, which...
- conversion of MnO− 4 to MnO2− 4, manganate. Oxygen (O2) Ozone (O3) Hydrogen peroxide (H2O2) and other inorganic peroxides, Fenton's reagent Fluorine (F2), chlorine...
- Manganese(II) oxide, MnO (aka Ferrite Grade) Manganese(II,III) oxide, Mn3O4 Manganese(III) oxide, Mn2O3 Manganese dioxide, (manganese(IV) oxide), MnO2 Manganese(VI)...
- Mn-O distances in KMnO4. It is isostructural with pot****ium sulfate. The industrial route entails treatment of MnO2 with air: 2 MnO2 + 4 KOH + O22...
- compound with the formula Mn2O3. Heating MnO2 in air at below 800 °C produces α-Mn2O3 (higher temperatures produce Mn3O4). γ-Mn2O3 can be produced by oxidation...
- two half-cell reactions gives: 6 e− + 4 H2O + 2 MnO− 4 → 2 MnO2 + 8 OH− 6 OH− + 3 SO2− 3 → 3 SO2− 4 + 3 H2O + 6 e− Adding these two half-cell reactions...
- manganese(IV) oxide with concentrated hydrochloric acid. MnO2 + 4 HCl → MnCl2 + 2 H2O + Cl2 This reaction was once used for the manufacture of chlorine...