What is Fe(OH)2? Important knowledge about Fe(OH)2.

  1. Definition of Fe(OH)2

Fe(OH)2, also known as Iron(II) hydroxide, is a greenish-white solid. It consists of one iron atom (Fe) and two hydroxide groups (OH). The atomic mass of Fe is 56 and the atomic mass of OH is 17 (1 oxygen atom + 1hydrogenatom) -> , hence the molecular weight of Fe(OH)2 is 90. The ionic structure of Fe(OH)2 includes one Fe2+ ion and two OH- ions.

  1. Properties: Fe(OH)2

Fe(OH)2 is a solid at room temperature, with a greenish-white color and no smell. Its pH is about 7, indicating that it is neutral. Under oxidizing conditions, it can transform into Fe(OH)3, producing a characteristic brown color. Fe(OH)2 can also react with strong acids to form iron(II) salts and water.

  1. Common chemical equations involving Fe(OH)2

Fe(OH)2 does not react with metals, but can react with acids. Examples include:

Fe(OH)2 + 2HCl -> FeCl2 + 2H2O

Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O

Fe(OH)2 does not react with non-metals but can react with salts. For example:

Fe(OH)2 + 2NaCl -> 2NaOH + FeCl2

  1. Synthesis of Fe(OH)2

Fe(OH)2 can be synthesized in the laboratory by reacting iron with water and air at high temperature. In industry, it is typically produced through the oxidation process of iron in a water environment.

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