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Properties of substance:

zinc hydroxide

Group of substances:

inorganic

Physical appearance:

white rhombic crystals

Empirical formula (Hill's system for organic substances):

H2O2Zn

Structural formula as text:

Zn(OH)2

Molar/atomic mass: 99.39

Decomposition temperature (°C):

125

Solubility (g/100 g of solvent):

water: 0.000199 (25°C) [Ref.]

Density:

3.05 (20°C, g/cm3)

Dissociation:

pKb (2) = 4.4 (25°C, water)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-645.4 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-555.9 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

76.99 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

72.27 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1589-1591
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 113 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru