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  2. Manganese dioxide - Wikipedia

    en.wikipedia.org/wiki/Manganese_dioxide

    One method starts with natural manganese dioxide and converts it using dinitrogen tetroxide and water to a manganese(II) nitrate solution. Evaporation of the water leaves the crystalline nitrate salt. At temperatures of 400 °C, the salt decomposes, releasing N 2 O 4 and leaving a residue of purified manganese dioxide. [8]

  3. Winkler titration - Wikipedia

    en.wikipedia.org/wiki/Winkler_titration

    Dissolved oxygen (D.O.) is widely used in water quality studies and routine operation of water reclamation facilities to analyze its level of oxygen saturation. In the test, an excess of manganese(II) salt, iodide (I −) and hydroxide (OH −) ions are added to a water sample causing a white precipitate of Mn(OH) 2 to form.

  4. Manganese oxide - Wikipedia

    en.wikipedia.org/wiki/Manganese_Oxide

    Manganese oxide is any of a variety of manganese oxides and hydroxides. [1] These include Manganese(II) oxide, MnO; Manganese(II,III) oxide, Mn 3 O 4; Manganese(III) oxide, Mn 2 O 3; Manganese dioxide, MnO 2; Manganese(VI) oxide, MnO 3; Manganese(VII) oxide, Mn 2 O 7; Other manganese oxides include Mn 5 O 8, Mn 7 O 12 and Mn 7 O 13.

  5. Pyrolusite - Wikipedia

    en.wikipedia.org/wiki/Pyrolusite

    Pyrolusite is a mineral consisting essentially of manganese dioxide (Mn O 2) and is important as an ore of manganese. [7] It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish-black streak, and readily soils the fingers.

  6. Chemical chameleon - Wikipedia

    en.wikipedia.org/wiki/Chemical_chameleon

    The chemical chameleon reaction shows the process in reverse, by reducing violet potassium permanganate first to green potassium manganate and eventually to brown manganese dioxide: [1] [2] [5] KMnO 4 (violet) → K 2 MnO 4 (green) → MnO 2 (brown/yellow suspension) Blue potassium hypomanganate may also form as an intermediate. [6]

  7. Shreveport Water Department addresses historic levels of ...

    www.aol.com/shreveport-water-department...

    The Shreveport Water Department is is advising customers that the water is safe to drink despite seeing high levels of manganese in the water. The department is working hard to resolve the situation.

  8. Manganese(II) oxide - Wikipedia

    en.wikipedia.org/wiki/Manganese(II)_oxide

    Manganese(II) oxide is an inorganic compound with chemical formula MnO. [2] It forms green crystals. The compound is produced on a large scale as a component of fertilizers and food additives .

  9. Permanganate - Wikipedia

    en.wikipedia.org/wiki/Permanganate

    A permanganate (/ p ər ˈ m æ ŋ ɡ ə n eɪ t, p ɜːr-/) [1] is a chemical compound with the manganate(VII) ion, MnO − 4, the conjugate base of permanganic acid.Because the manganese atom has a +7 oxidation state, the permanganate(VII) ion is a strong oxidising agent.