Question

Is $\mathrm{Mn}{\left(\mathrm{OH}\right)}_2$ soluble or insoluble in water?

Answer 1

Manganese hydroxide:

1. The inorganic chemical with the formula $\mathrm{Mn}{\left(\mathrm{OH}\right)}_2$ is manganese(II)hydroxide.
2. It is a white solid, however, samples quickly turn darker when exposed to air because of oxidation.
3. Many inorganic hydroxide salts are insoluble in water. Aside from salts containing alkali metal ions such as ${{\mathrm{NH}}_4}^{+},{\mathrm{Ba}}^{+2},{\mathrm{Sr}}^{+2},{\mathrm{Ca}}^{+2}$or ${\mathrm{Tl}}^{+}$
4. Also it has a low value for solubility i.e. $0.00034\mathrm{g}$ per $100\mathrm{mL}$

Therefore, $\mathrm{Mn}{\left(\mathrm{OH}\right)}_2$ is insoluble in water.