Formation of iron iii chloride
Answers
Answer:
It can be made by mixing hydrochloric acid and iron(III) oxide. It can be made by mixing iron and chlorine. It can also be made by reacting iron(II) chloride with chlorine at a low temperature.
Explanation:
Iron(III) chloride, generically called ferric chloride, is the chemical compound with the formula FeCl3. The crystals appear a dark green colour by reflected light, but by transmitted light they appear purple-red as its colour depends upon the viewing angle. It is deliquescent, fuming in moist air due to the evolution of HCl, which hydrates, giving a mist. When dissolved in water, FeCl3 undergoes hydrolysis and gives off a great deal of heat as it is an exothermic reaction. The resulting brown, acidic solution, which is corrosive, is used as a coagulant in treating sewage and drinking water and as an etchant for copper-based metals (such as those found in printed circuit boards) and stainless steel.
Anhydrous iron(III) chloride is a fairly strong Lewis acid, and it is used as a catalyst in organic synthesis. The brownish-yellow hexahydrate is a common commercial form of ferric chloride, a yellowish species described by the formula [FeCl2(H2O)4]Cl.2H2O (compare chromium(III) chloride).