Ferrous sulfate: physico-chemical properties, production, application

Ferrous sulfate - a chemical compound that is extremely widespread in nature and are widely used in various fields of economic activity.There ferric modifications of the substance.The first type, also called Vitriol, a binary non-volatile inorganic compound having the formula FeSO4.Outwardly, this chemical compound is a transparent crystalline hydrates bright greenish-blue color with a high degree of hygroscopicity and solubility in aqueous media.In a vacuum, FeSO4 decomposed with high intensity, full of decay occurs at a temperature of about 700 ° C.

divalent iron sulfate is a widely used reagent at room temperature crystallized from solution in the form of heptahydrate FeSO4 ∙ 7H2O, which is a matter of pale blue color.For prolonged storage, it disappears, turning into a white powdery substance and outdoors gradually turn yellow due to oxidation processes.Weathering of ferrous sulfate is explained by the fact that its structure is present in one molecule of outer water that leaves the crystal lattice easily.

Trivalent anhydrous ferric sulfate is a light yellow, paramagnetic, extremely hygroscopic crystalline substance of the monoclinic system.Capable of forming orthorhombic and hexagonal structural modifications.Trivalent iron sulfate crystallizes well from a variety of solutions in a variety of hydrated compounds containing up to ten water molecules.When slow heating is converted into the anhydrous salt which is well decomposed into hematite and sulfur anhydrite at a temperature of about 650 ° C.Like many other salts of triply charged cations, ferrous sulfate forms alum, which crystallize in the form of a pale violet octahedra.This material is a good reducing agent for the ion Ag +, has strong oxidizing properties.Trivalent ferric sulfate hydrolysis which occurs by refluxing the solution in which it is contained, exist in nature mainly in the jarosite (minerals).

In the industry, this material is obtained primarily as a by-product in the metalworking enterprises of various etching solutions used for descaling of steel products.Also this substance may be isolated by roasting pyrites or marcasites with NaCl in air.Another method of synthesis of iron oxide is heated in the salts of sulfuric acid.In laboratory practice, the compound is isolated from the Fe (OH) 2.

Considerable curiosity is the fact that the ferrous sulfate was detected on Mars in 2009. The spacecraft "Spirit", from which scientists have concluded that the flow on the surface of strong oxidation processes.Because of the very low density of the substance rover so deeply mired in its deposits, that even part of the body touched the deeper layers of the Martian soil.

On Earth, ferric sulfate due to its ability to hydrolyze along with Alum is used as a flocculant in water purification.Forming flakes hydroxide, a chemical compound adsorbs many contaminants.Also, this material is widely used in medicine, which is used as a therapeutic and prophylactic agent for iron deficiency anemia.

in the agricultural industry iron sulfate used for chemical soil improvement, pest control of crops, destruction of mosses, lichens, weeds and spores of parasitic fungi.In horticulture, iron sulfate is used for fertilizing fruit trees as a catalyst for the formation of chlorophyll.The most sensitive to a lack of this substance is apple, pear, plum and peach.

In industry iron sulfate is widely used in the textile industry, where it serves as an important component of the ink and a variety of mineral paints.Also, this material is a good wood preservative.Some so-called solutions of off ferrous sulfate processed into insulating materials such as ferron ferrigips and representing a mixture of hydrates of the compound with various fillers.