12th||NEET||JEE MAIN||D-BLOCK ELEMENTS (LEC VIII)||potassium permanganate preparation and properties
Автор: chemistry with priya
Загружено: 2020-07-26
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12th||NEET||JEE MAIN||D-BLOCK ELEMENTS (LEC VIII)||potassium permanganate preparation and properties
#potassium permanganate preparation and properties
#reaction of potassium permanganate
#oxidizing properties of potassium permanganate
#chemistrywithpriya
#explanation
Hello students
Potassium permanganate is prepared from an ore called pyrolusite having formula MnO2, in two steps
In first step the powdered ore is fused with potassium hydroxide or potassium carbonate in the presence of air or oxidizing agent such as potassium nitrate or potassium chlorate, when we get green colour of potassium manganate.
In second step the potassium manganate is oxidized to potassium permanganate either through the chemical oxidation or through electrolytic oxidation.
KMnO4 is a deep purple black prism shape crystals, which are slightly soluble in cold water but highly soluble in hot water.
On heating it decomposes to give potassium manganate and evolve oxygen gas.
Potassium manganate on further heating decomposes to form potassium manganite (K2MnO3) with the evolution of oxygen gas.
KMnO4 act as an oxidizing agent in basic, alkaline and acidic medium.
#potassium permanganate preparation and properties
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