- Definition of Mn(OH)2
Mn(OH)2, also known as manganese(II) hydroxide or manganous hydroxide, is a chemical substance. In English, we call it Manganese(II) Hydroxide. Each molecule of it consists of one manganese atom, denoted as Mn, and two hydroxide atoms, denoted as OH. The atomic mass of manganese is about 54.94 grams/mol, while that of hydroxide is 17.01 grams/mol. Therefore, the molecular mass of Mn(OH)2 is about 88.95 grams/mol. The ion composition of Mn(OH)2 is [Mn(OH)2]-.
- Properties of Mn(OH)2
Mn(OH)2 is a solid substance that is dark brown in color and has no special odor. The pH value of Mn(OH)2 solution in water lies between 10 to 14, indicating that it is strongly alkaline. The chemical property of Mn(OH)2 is that it easily reacts with acids to form salts and water.
- Common chemical equations involving Mn(OH)2
Mn(OH)2 is commonly encountered in chemical reactions with metals, acids, non-metals, and salts. Specific examples will be presented during the lecture.
- Synthesis of Mn(OH)2
Mn(OH)2 can be synthesized in the laboratory by reacting manganese(II) sulfate with sodium hydroxide. Industrially, it is usually produced from the oxidation process of manganese(II) by hydroxide in an alkaline solution.