Potassium permanganate in Latin is called Kalii permanganas.The world is just a potassium permanganate - potassium salt of the acid in the reaction of manganese.The letter designation KMnO.Coming into contact with the organic forms of protein - albuminates, in the sense of the body, this reaction is transferred to a burning sensation, knitting, local irritation, while having a healing effect and deodorant property and antidotes.
potassium permanganate obtained by electrochemical oxidation of manganese compounds, or a change in their proportions.Here are some reactions to potassium permanganate is widely used in industry and pharmacology:
2MnO2 +3 Cl2 + 8KOH → 2KMnO4 + 6KCl + 4H2O
2K2MnO4 + 2H2O → 2KMnO4 + H2 ↑ + 2KOH.
Here, as we see, manganese oxide reacts with the salts of chlorine and potassium molecules.The second account of the reaction is widely used in industry, since it is produced by potassium permanganate endothermic by the electrolysis of concentrate.
physical properties of potassium permanganate
In science, this compound is also called potassium permanganate, which is a granular crystals rhombic shape and dark purple.The potassium permanganate crystals form decomposes on heating temperature of 240 ° C and above to form oxygen evolution.It demonstrates the following reaction:
2KMnO4 = K2MnO4 + MnO2 + O2.
matter density 2.703 g / cm.cube, the molar mass of potassium permanganate - 158.03 g / mol.The solubility of the compound in the water depends on the concentration and the water temperature (data presented in Table 1).
Table 1. The solubility of potassium permanganate at various temperatures
|crystals grams / 100 grams of water||2,8||4,1||6,4||8,3||11,2||14,4|
Depending on the number of crystals added to water of different temperatures, each solution will have itsshade - from a weak, pale crimson at a low concentration to a purple-violet - at large.Other solvents potassium permanganate crystals protrude acetone, ammonia and methyl alcohol.
chemical properties of potassium permanganate
substance "potassium permanganate" is a pretty strong oxidant.Depending on the pH of the medium it acts on various types of substances being reduced to manganese in the equation of compounds of different degrees of oxidation.For example, in an acidic environment - II in an alkaline - to VI, in a neutral medium, respectively - to IV.Adjoining
with concentrated sulfuric acid, potassium permanganate, chemical properties which indicate oxidation causes an explosive reaction, and releases oxygen when heated - the O2 extraction method widely used in industry.
The use of potassium permanganate
In modern laboratory producing potassium permanganate common in organic synthesis as an oxidant.The alkaline solution is an effective cleaning and degreasing agent.The popularity and universal application of a 0.1% solution in medicine in the treatment of burns, rinse, disinfection, eliminates toxins.Some pharmacies do not let this stuff, since the order of the Ministry, it ranked among the explosive.But you can get potassium permanganate in gardening stores where it is sold as a fertilizer.