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Properties of substance:

barium hydroxide

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H2BaO2

Structural formula as text:

Ba(OH)2

Molar/atomic mass: 171.35

Melting point (°C):

408

Decomposition temperature (°C):

1000

Solubility (g/100 g of solvent):

acetone: sparingly soluble [Ref.]
ammonia liquid : insoluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: 12.61 (25°C) [Ref.]
water: 1.67 (0°C) [Ref.]
water: 2.48 (10°C) [Ref.]
water: 3.89 (20°C) [Ref.]
water: 5.59 (30°C) [Ref.]
water: 8.22 (40°C) [Ref.]
water: 13.1 (50°C) [Ref.]
water: 20.9 (60°C) [Ref.]
water: 101.4 (80°C) [Ref.]

Density:

4.5 (20°C, g/cm3)

Dissociation:

pKb (1) = 0.64 (25°C, water)

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

-950 (s)

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

-886 (s)

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

124 (s)

LD50 (mg/kg):

308 (rats, oral)
255 (rats, intraperitoneal)

References:

  1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 342-343
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 176-179
  3. Ахметов Т.Г. Химия и технология соединений бария. - М.: Химия, 1974. - pp. 46-60 [Russian]
  4. Вредные химические вещества: Неорганические соединения элементов I-IV групп. Справочник. - Л.: Химия, 1988. - pp. 136 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 54 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 281 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru