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Properties of substance:

copper(II) hydroxide

Synonyms:

cupric hydroxide

Group of substances:

inorganic

Physical appearance:

powder

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

H2CuO2

Structural formula as text:

Cu(OH)2

Molar/atomic mass: 97.56

Decomposition temperature (°C):

100-400

Solubility (g/100 g of solvent):

water: 0.000673 (18°C) [Ref.]

Density:

3.37 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    CuSO4 * 5H2O + 2NaOH → Cu(OH)2 + Na2SO4 + 5H2O

Dissociation:

pKb (2) = 6.47 (25°C, water)
pKsp (0) = 19.66 (20°C, water)

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

-444.3 (s)

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

-359.4 (s)

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

84 (s)

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

96 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 494-495
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 270-271 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - 2-е изд. - Л.: Химия, 1978. - pp. 80 [Russian]
  4. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 315 [Russian]
  5. Чалый В.П. Гидроокиси металлов (закономерности образования, состав, структура и свойства). - Киев: Наукова думка, 1972. - pp. 52-58 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru