Manganese(II) hydroxide is the

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemi ...

with the formula Mn (OH)₂. It is a white solid although samples darken quickly upon exposure to air owing to oxidation. It is poorly soluble in water.

Preparation and reactions

Manganese(II) hydroxide precipitates as a solid when an

alkali In chemistry, an alkali (; from ar, القلوي, al-qaly, lit=ashes of the saltwort) is a basic, ionic salt of an alkali metal or an alkaline earth metal. An alkali can also be defined as a base that dissolves in water. A solution of ...

metal

hydroxide Hydroxide is a diatomic anion with chemical formula OH−. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water ...

is added to an

aqueous An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would ...

solution of Mn²⁺ salt:H. Lux "Manganese(IV) Hydroxide" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1456. :Mn²⁺ + 2 NaOH → Mn(OH)₂ + 2 Na⁺ Manganese(II) hydroxide oxidises readily in air, as indicated by darkening of samples. The compound adopts the brucite structure, as do several other metal dihydroxides.

References

{{Hydroxides Manganese(II) compounds Hydroxides