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Properties of substance:

nickel(II) nitrate hexahydrate

Group of substances:

inorganic

Physical appearance:

green triclinic crystals

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

H12N2NiO12

Structural formula as text:

Ni(NO3)2 * 6H2O

Molar/atomic mass: 290.81

Melting point (°C):

56.7

Boiling point (°C):

136.7

Solubility (g/100 g of solvent):

acetone: sparingly soluble [Ref.]
diethyl ether: slightly soluble [Ref.]
dimethylformamide: 20 (25°C) [Ref.]
ethanol: soluble [Ref.]
ethyl acetate: insoluble [Ref.]
glycerol: soluble [Ref.]
methanol: soluble [Ref.]
methyl acetate: difficulty soluble [Ref.]
pyridine: slightly soluble [Ref.]
water: 94.2 (20°C) [Ref.]
water: 118.4 (40°C) [Ref.]
water: 157.7 (60°C) [Ref.]
water: 225 (100°C) [Ref.]

Hygroscopic:

yes

Reactions:

  1. [Ref.1]
    Ni(NO3)2 * 6H2O → Ni(NO3)2 * 2H2O + 4H2O
    Ni(NO3)2 * 2H2O → Ni(OH)2NO3 * H2O + NO2

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

-2215 (s)

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

511 (s)

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

462 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

41.4

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 172-173 [Russian]
  2. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 152-153 [Russian]
  3. Химическая технология неорганических веществ. - Кн.2, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 507-508 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru