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Properties of substance:

ammonium dichromate

Group of substances:

inorganic

Physical appearance:

monoclinic crystals

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

H8Cr2N2O7

Structural formula as text:

(NH4)2Cr2O7

Molar/atomic mass: 252.06

Decomposition temperature (°C):

180

Solubility (g/100 g of solvent):

acetone: insoluble [Ref.]
dimethylsulfoxide: 45 (25°C) [Ref.]
ethanol: soluble [Ref.]
water: 18.3 (0°C) [Ref.]
water: 35.6 (20°C) [Ref.]
water: 38.7 (25°C) [Ref.]
water: 46.5 (30°C) [Ref.]
water: 58.5 (40°C) [Ref.]
water: 86.6 (60°C) [Ref.]
water: 115 (80°C) [Ref.]
water: 155.6 (100°C) [Ref.]

Properties of solutions:

27,9% (wt.), solvent - water
  Density (g/cm3) = 1.18 (25°)

Density:

2.15 (25°C, g/cm3)

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

-1799 (s)

References:

  1. Galwey A.K., Brown M.E. Thermal Decomposition of Ionic Solids. - Elsevier, 1999. - pp. 429
  2. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 230
  3. Milne G.W.A. Gardner's Commercially Important Chemicals. - Wiley-Interscience, 2005. - pp. 33
  4. Perry D.L. Handbook of Inorganic Compounds. - 2nd ed. - CRC Press, 2011. - pp. 21
  5. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1098
  6. Иванова М.А., Кононова М.А. Химический демонстрационный эксперимент. - М.: Высшая школа, 1969. - pp. 44 [Russian]
  7. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 54 [Russian]
  8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 221 [Russian]
  9. Химическая технология неорганических веществ. - Кн.2, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 146, 149 [Russian]
  10. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 320 [Russian]
  11. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 42 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru