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Properties of Mn(OH)2

Properties of Mn(OH)2 (Manganese(II) hydroxide):

Compound NameManganese(II) hydroxide
Chemical FormulaMn(OH)2
Molar Mass88.952725 g/mol

Chemical structure
Mn(OH)2 (Manganese(II) hydroxide) - Chemical structure
Lewis structure
3D molecular structure
Physical properties
Appearancewhite to pink solid
Solubility0.0034 g/100mL
Density3.2580 g/cm³
Helium 0.0001786
Iridium 22.562
Melting140.00 °C
Helium -270.973
Hafnium carbide 3958

Alternative Names

Manganese dihydroxide, manganese hydroxide, Manganous hydroxide, Pyrochroite

Elemental composition of Mn(OH)2
ElementSymbolAtomic weightAtomsMass percent
ManganeseMn54.938045161.7609
OxygenO15.9994235.9728
HydrogenH1.0079422.2662
Mass Percent CompositionAtomic Percent Composition
Mn: 61.76%O: 35.97%H: 2.27%
Mn Manganese (61.76%)
O Oxygen (35.97%)
H Hydrogen (2.27%)
Mn: 20.00%O: 40.00%H: 40.00%
Mn Manganese (20.00%)
O Oxygen (40.00%)
H Hydrogen (40.00%)
Mass Percent Composition
Mn: 61.76%O: 35.97%H: 2.27%
Mn Manganese (61.76%)
O Oxygen (35.97%)
H Hydrogen (2.27%)
Atomic Percent Composition
Mn: 20.00%O: 40.00%H: 40.00%
Mn Manganese (20.00%)
O Oxygen (40.00%)
H Hydrogen (40.00%)
Identifiers
CAS Number18933-05-6
SMILES[OH-].[OH-].[Mn+2]
Hill formulaH2MnO2

Related compounds
FormulaCompound name
HMnO4Permanganic acid
H2O2Mn
H2MnO4Hydrogen manganate

Sample reactions for Mn(OH)2
EquationReaction type
H3PO4 + Mn(OH)2 = Mn3(PO4)2 + H2Odouble replacement
HNO3 + Mn(OH)2 = H2O + Mn(NO3)2double replacement
Mn(OH)2 + H2O2 = MnO2 + H2Odouble replacement
Mn(OH)2 + O2 = MnO2 + H2Odouble replacement
HNO3 + Mn(OH)2 = HOH + Mn(NO3)2double replacement

Related
Molecular weight calculator
Oxidation state calculator

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