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Properties of substance:

cobalt(II) sulfate

Group of substances:

inorganic

Physical appearance:

rhombic crystals

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

CoO4S

Structural formula as text:

CoSO4

Molar/atomic mass: 154.99

Decomposition temperature (°C):

600

Solubility (g/100 g of solvent):

acetic acid: practically insoluble [Ref.]
ammonia liquid : insoluble [Ref.]
benzonitrile: insoluble [Ref.]
ethanol: 0.017 (15°C) [Ref.]
ethanol: 0.018 (25°C) [Ref.]
ethanol: 0.023 (45°C) [Ref.]
ethanol: 0.026 (55°C) [Ref.]
ethyl acetate: insoluble [Ref.]
ethylene glycol : 33 (20°C) [Ref.]
glycerol: very soluble [Ref.]
methanol: 0.3 (15°C) [Ref.]
methanol: 0.418 (25°C) [Ref.]
methanol: 0.419 (35°C) [Ref.]
methanol: 0.372 (45°C) [Ref.]
methanol: 0.267 (55°C) [Ref.]
water: 24.7 (0°C) [Ref.]
water: 30.8 (10°C) [Ref.]
water: 35.5 (20°C) [Ref.]
water: 37.6 (25°C) [Ref.]
water: 48.8 (40°C) [Ref.]
water: 51.1 (50°C) [Ref.]
water: 54.8 (70°C) [Ref.]
water: 49.3 (80°C) [Ref.]
water: 38.5 (100°C) [Ref.]

Hygroscopic:

yes

Density:

3.71 (25°C, g/cm3)

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

-868.2 (s)

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

-791.9 (s)

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

113.4 (s)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 959-960
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 432-442
  3. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 142-143 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 74 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 354-355 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1009 [Russian]
  7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 100-101 [Russian]
  8. Химическая технология неорганических веществ. - Кн.2, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 480-481 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru