inorganic iron hydroxide compound 3 has the chemical formula Fe (OH) 2.It belongs to a series of amphoteric compounds of iron, which is dominated by properties characteristic of reason.In view of this substance is a white crystals, which, when prolonged exposure to the outdoors gradually darken.There are variants of greenish crystals.In daily life, the substance can observe each in the form of greenish deposits on metal surfaces, which indicates the beginning of rust - iron hydroxide 3 serves as one of the intermediate stages of the process.
naturally occurring compounds found as amakinita.This crystalline mineral, but the actual iron contains more impurities of magnesium and manganese, all of these substances give amakinitu different shades - from yellow-green to pale green, depending on the percentage of a particular element.The hardness of a mineral is 3.5-4 units on the Mohs scale and a density of about 3 g / cm³.
The physical properties of the substance should also include its extremely low solubility.In the case where the iron hydroxide 3 is subjected to heat, it decomposes.
This substance is very active and reacts with many other substances and compounds.Thus, for example, having the properties of a base, it reacts with various acids by neutralization.In particular, sulfuric acid, ferric hydroxide during the reaction of 3 lead to the production of iron sulfate (III).Since this reaction can occur by conventional calcination in open air, a method of producing inexpensive sulfate used both in laboratory and in industrial environments.
During the reaction with hydrochloric acid, it is a result of the formation of iron chloride (II).
In some cases, iron hydroxide and 3 may exhibit acid properties.Thus, for example, by reaction with a highly concentrated (concentration should be at least 50%) sodium hydroxide solution obtained tetragidroksoferrat (II) solution, precipitates as precipitate.However, for the flow of such a reaction is necessary to provide a fairly difficult conditions: the reaction should take place in a boiling solution of nitric atmospheric environment.
As mentioned above, by heating decomposed substance.The result of this expansion acts as iron oxide (II), and, moreover, as impurities metallic iron obtained and its derivatives dizheleza oxide (III), whose chemical formula is Fe3O4.
How to make iron hydroxide 3, the preparation of which is related to its ability to react with acids?Before you proceed with the experience, be sure to recall the rules of safety during these experiments.These rules apply to all cases, treatment with the acid-alkaline solutions.The main thing here - to provide protection and to avoid dripping solutions to the mucous membranes and skin.
So hydroxide may receive during the reaction, wherein the reaction of ferric chloride (III) and KOH - potassium hydroxide.This method - the most common reason for the formation of insoluble.The interaction of these substances takes regular exchange reaction, resulting in precipitate turns brown.This precipitate is the desired substance.
Application of iron hydroxide in industrial production are widely.The most common is its use as active substance in a nickel-iron battery type.Moreover, the compound used in metallurgy to produce various ferro alloys, as well as produce the product in the plating, avomobilestroenii.
