Potassium manganate

\( \newcommand\) • • • • • • • • • • • • The carbon-carbon double bonds in alkenes such as ethene react with potassium manganate(VII) solution (potassium permanganate solution). Oxidation of alkenes with cold dilute potassium manganate(VII) solution Alkenes react with potassium manganate(VII) solution in the cold. The colorchange depends on whether the potassium manganate(VII) is used under acidic or alkaline conditions. • If the potassium manganate(VII) solution is acidified with dilute sulfuric acid, the purple solution becomes colorless. • If the potassium manganate(VII) solution is made slightly alkaline (often by adding sodium carbonate solution), the purple solution first becomes dark green and then produces a dark brown precipitate. Chemistry of the Reaction We'll look at the reaction with ethene. Other alkenes react in just the same way. Manganate(VII) ions are a strong oxidizing agent, and in the first instance oxidize ethene to ethane-1,2-diol (old name: ethylene glycol). Looking at the equation purely from the point of view of the organic reaction: This type of equation is quite commonly used in organic chemistry. Oxygen written in square brackets is taken to mean "oxygen from an oxidizing agent". The reason for this is that a more normal equation tends to obscure the organic change in a mass of other detail - as you will find below! The full equation depends on the conditions. • Under acidic conditions, the manganate(VII) ions are reduced to manganese(II) ions....

Potassium Manganate is an organic salt consisting of potassium and manganese. It is a mineral, which is used to make chemicals. It is also used in the Cement, Pigments, Soaps, and the production of glass. Potassium Manganate is a white powder. Potassium manganate, also known as calcium manganate or potassium manganate, is a chemical that is used in the production of manganese dioxide, which is a red pigment used in paints, plastics, dyes and ink. It is also used to produce a violet colored glass. It is also used in the production of the alkali manganese sulfate, which is used for the extraction of manganese from iron-manganese ore. Potassium Manganate, otherwise known as KMnO4, is a manganese oxide used as a catalyst in the energy-intensive process of potassium extraction. KMnO4 is also used to make potassium hydroxide (KOH), which is the main ingredient used in the manufacturing of potash, a salt used in the production of fertilizer and also used in other manufacturing processes. Potassium manganate, often simply known as potassium manganate, KMN, KMnO4, KMnO2, KMnO, KMnO2, KMn or K-MnO is a chemical compound of the Potassium Oxovanadium(IV) Oxo-trioxide(III) (MOx) and Manganese (IV) oxide(III) (MnO2) family. This novel compound is a white odorless powder, and is the most stable form of manganate minerals, such as the Manganese Spar and the Manganese Oxovanadium Spar, which are found in nature in oxovanadium(IV) and oxovanadium(III). Potassium Manganate, also known as KMM...

Except where otherwise noted, data are given for materials in their Y Y N?) Potassium manganate is a 2MnO 4. It contains Properties [ | ] Potassium manganate is a green solid. It can Preparation [ | ] It is made by reacting Uses [ | ] Potassium manganate does not have many uses. It is mainly made when potassium permanganate is made. Safety [ | ] Potassium manganate is a Related pages [ | ] • •

The manganate(VI) ion is tetrahedral, similar to sulfate or chromate: indeed, manganates are often isostructural with sulfates and chromates, a fact first noted by 1 ion, it is λ max= 606nm ( ε = 1710dm 3 mol −1 cm −1). Preparation [ ] 4 MnO − 4 + 4 OH − → 4 MnO 2− 4 + 2 H 2O + O 2 Potassium manganate is prepared industrially, as an intermediate to 2 MnO 2 + 4 OH − + O 2 → 2 MnO 2− 4 + 2 H 2O Disproportionation [ ] Manganates are unstable towards Uses [ ] Manganates, particularly the insoluble 4, have been used as Related compounds [ ] Manganate is formally the H 2MnO 4, which cannot be formed because of its rapid disproportionation. However, its second HMnO − 4 ⇌ MnO 2− 4 + H +p K a = 7.4 ± 0.1 Manganites [ ] The name " MnO 3− 3, with manganese in the +3 oxidation state. However, most of these "manganites" do not contain discrete IIIO 3, CaMn IVO 3), III,IV 2O 4) or IIIO 2, NaMn IIIO 2) structures. One exception is 6Mn 2O 6, which contains discrete Mn 2O 6− 6 anions. References [ ] • ^ a b • ^ a b c Advanced Inorganic Chemistry (4thed.), New York: Wiley, p.746, 0-471-02775-8 . • ^ a b c Rush, J. D.; Bielski, B. H. J. (1995), "Studies of Manganate(V), -(VI), and -(VII) Tetraoxyanions by Pulse Radiolysis. Optical Spectra of Protonated Forms", Inorg. Chem., 34 (23): 5832–38, • Lee, Donald G.; Chen, Tao (1989), "Oxidation of hydrocarbons. 18. Mechanism of the reaction between permanganate and carbon-carbon double bonds", J. Am. Chem. Soc., 111 (19): 7534–38, . • ^ a b c Palen...

What is potassium permanganate? Potassium permanganate is a common chemical compound that combines manganese oxide ore with potassium hydroxide. It was first developed as a disinfectant in 1857. Since then, it’s been widely used to treat a variety of skin conditions, including Keep reading to learn more about its medical uses and safety tips. When applied to your skin, potassium permanganate kills germs by releasing oxygen when it meets compounds in your skin. It also acts as an astringent, which is a drying agent. Some of the conditions that potassium permanganate can help treat include: • Infected eczema . If you have • Open and blistering wounds. Potassium permanganate is used as a wet dressing for wounds on your skin’s surface that are blistered or oozing pus. • Athlete’s foot and impetigo . Potassium permanganate can help to treat both bacterial and fungal skin infections such as Before applying potassium permanganate to your skin, it’s important to dilute it with water. To achieve an appropriate dilution using potassium permanganate 0.1% solution, combine 1 part potassium permanganate with 10 parts hot water. Undiluted potassium permanganate has a striking purple color, but a diluted solution should be pink. Potassium permanganate must be diluted since undiluted solution may cause burns. Even with dilution it may irritate the skin, and with repeated use may still cause burns. Potassium permanganate also comes in 400-milligram (mg) tablets. To utilize the tablets in a...

A compound, KMnO 4, forming purple crystals with a metallic sheen, soluble in water (intense purple solution), acetone, and methanol, but decomposed by ethanol; r.d. 2.70; decomposition begins slightly above 100°C and is complete at 240°C. The compound is prepared by fusing manganese(IV) oxide with potassium hydroxide to form the manganate and electrolysing the manganate solution using iron electrodes at about 60°C. An alternative route employs production of sodium manganate by a similar fusion process, oxidation with chlorine and sulphuric acid, then treatment with potassium chloride to crystallize the required product. Potassium manganate(VII) is widely used as an oxidizing agent and as a disinfectant in a variety of applications, and as an analytical reagent. PRINTED FROM OXFORD REFERENCE (www.oxfordreference.com). (c) Copyright Oxford University Press, 2023. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use (for details see date: 15 June 2023 • Cookie Policy • Privacy Policy • Legal Notice • Credits • Accessibility