![]() When manganese affects brain it causes forgetfulness, hallucinations and nerve damage. ![]() Poisoning: If too much manganese is present in the body then it becomes toxic and hinders the functioning of the body.If there is any shortage then it leads to blood clotting, skeletal disorders, birth defects, change of hair colour, neurological disorders, etc. Shortage: Manganese is an essential element in the human body.This principle is used in newer alkaline batteries also but with different electrolyte solution. The manganese dioxide is reduced to manganese oxide-hydroxide during discharging so that the hydrogen does not accumulate at anode. Batteries: Manganese(IV) oxide was used as an electron acceptor from zinc in the original dry cell batteries.The manganese in this compound is present in +1 oxidation state, which is rare. Engines: A compound of manganese called methylcyclopentadienyl manganese tricarbonyl is used as an additive in unleaded gasoline in order to boost the octane rating and reduce the knocking.Aluminium having about 1.5% of manganese have high resistance to corrosion and the grain absorbs impurities better. Alloys: Aluminium alloys are the second major application of commercially produced manganese.Ferromanganese products often have manganese in the concentrations of 80%. Manganese is introduced while steel making in order to remove impurities such as oxygen, sulphur, and phosphorus to improve its malleability. Steel industries: About 85-90% of manganese produced commercially is used in iron and steel industries.Relevance in Chemical and Related Industries The iron reacts with manganese dioxide to form iron hydroxide and elemental manganese. The ore is then grinded and put in leach tank where a mixture of sulfuric acid and ferrous ion is used as the leaching solution. Heap Leach: The manganese ore is subjected to the natural gas at the bottom of the heap which provides carbon monoxide for reduction of manganese ore to manganese dioxide and also the required temperature of 850☌.Electrowinning process: In order to produce pure manganese, ores are selected which do not contain iron, the manganese ore leached by sulfuric acid then the manganese diffused to the acid solution is subjected to electrowinning process which removes the manganese from solution and deposits it on the cathode material.Manganese(II) compounds are the most stable when compared to all other states.Manganese compounds with +7 oxidation states are extremely powerful oxidisers. ![]() Manganese has been observed to form compounds with wide oxidation states.Manganese has only one stable isotope which is manganese-55.The density of manganese is 7430 in S.I.The boiling point of manganese is 2061☌.The melting point of manganese is 1247☌.Manganese is a silvery-grey metal which looks like iron. ![]() Manganese nodules have also been found at the bottom of the ocean, the nodules contain about 24% manganese. Manganese occurs as manganese dioxide in pyrolusite and as manganese carbonate in rhodochrosite. The minerals in which manganese occurs in most quantities are pyrolusite and rhodochrosite. Its concentration in earth’s crust is about 0.1%. It is not found in free state and is usually present in minerals along with iron. Manganese is the fifth most abundant element on earth. The strong oxidiser made by Johann Heinrich Pott is potassium permanganate. Later it was found that Ignatius Kaim had already separated the manganese metal in 1771 for his dissertation work. He separated manganese from pyrolusite in 1774. The person who is credited to do this is Johan Gottlieb Gahn. During 1700s, many chemists tried to separate the unknown metal in pyrolusite. He was able to make one of the strongest oxidisers using the pyrolusite ore. Johann Heinrich Pott investigated a mineral called pyrolusite in 1740 and found that it did not contain any iron. The name is derived from the Latin word ‘Magnes’ which means Magnet. It is located in the Group 7 and Period 4 of the periodic table of elements. Atomic number is the number of protons in the nucleus of the atom. Elements are arranged in the periodic table on the basis of the atomic number. Manganese is the twenty-fifth element on the periodic table. Manganese Manganese Element Properties and Information
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |