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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)
The value determined is known as the permanganate value. In analytical chemistry, a standardized aqueous solution of KMnO 4 is sometimes used as an oxidizing titrant for redox titrations (permanganometry). As potassium permanganate is titrated, the solution becomes a light shade of purple, which darkens as excess of the titrant is added to the ...
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 .
Magnesium permanganate is used in various branches of industry and technology, such as: [2] a wood impregnation agent. an additive in tobacco filters. as a catalyst in the air oxidation of toluene to benzoic acid and in proteome research.
Another advantage that sodium permanganate has over potassium permanganate is that sodium permanganate, due to its high solubility, can be transported above ground as a liquid, decreasing the risk of exposure to granules or skin contact with the substance. [3] The primary redox reactions for permanganate are given by the equations: MnO − 4 ...
It is prepared by the oxidation of 2-chlorotoluene. The laboratory scale reaction employs potassium permanganate. [5] Alternatively it arises by the hydrolysis of α,α,α-trichloro-2-toluene. The chloride is readily replaced by ammonia to 2-aminobenzoic acid.
Toluene (/ ˈ t ɒ l. j u iː n /), also known as toluol (/ ˈ t ɒ l. j u. ɒ l , - ɔː l , - oʊ l / ), is a substituted aromatic hydrocarbon [ 15 ] with the chemical formula C 6 H 5 CH 3 , often abbreviated as PhCH 3 , where Ph stands for the phenyl group.
Potassium permanganate (KMnO 4) is a dark violet colored powder. Its reaction with glycerol (commonly known as glycerin or glycerine) (C 3 H 5 (OH) 3) is highly exothermic, resulting rapidly in a flame, along with the formation of carbon dioxide and water vapour: 14 KMnO 4 (s) + 4 C 3 H 5 (OH) 3 (l) → 7 K 2 CO 3 (s) + 7 Mn 2 O 3 (s) + 5 CO 2 ...