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Properties of substance:

sodium sulfate



skc-file

Synonyms:

sodium sulphate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

Na2O4S

Structural formula as text:

Na2SO4

Molar/atomic mass: 142.04

Melting point (°C):

884

Solubility (g/100 g of solvent):

1-butanol: insoluble [Ref.]
1-propanol: insoluble [Ref.]
2-propanol: 0.00209 (20°C) [Ref.]
2-propanol: 0.00222 (30°C) [Ref.]
2-propanol: 0.00219 (40°C) [Ref.]
2-propanol: 0.00175 (50°C) [Ref.]
acetic acid: sparingly soluble [Ref.]
acetone: insoluble [Ref.]
ammonia liquid : insoluble [Ref.]
benzonitrile: insoluble [Ref.]
deuterium oxide: 42.9 (40°C) [Ref.]
deuterium oxide: 37.4 (100°C) [Ref.]
ethanol: 0.44 (20°C) [Ref.]
ethanol: 0.48 (40°C) [Ref.]
ethyl acetate: insoluble [Ref.]
formic acid 95%: 16.5 (19°C) [Ref.]
glycerol: soluble [Ref.]
hydrazine: insoluble [Ref.]
hydrogen fluoride : soluble [Ref.]
hydrogen peroxide: 26.7 (0°C) [Ref.]
i-butanol: insoluble [Ref.]
methanol: 0.01 (10°C) [Ref.]
methanol: 0.017 (20°C) [Ref.]
methanol: 0.018 (30°C) [Ref.]
methanol: 0.02 (40°C) [Ref.]
methanol: 0.019 (50°C) [Ref.]
methanol 50%: 0.46 (10°C) [Ref.]
methanol 50%: 0.94 (20°C) [Ref.]
methanol 50%: 1.02 (30°C) [Ref.]
methanol 50%: 2.35 (40°C) [Ref.]
methanol 50%: 2.26 (50°C) [Ref.]
methyl acetate: insoluble [Ref.]
sulfur dioxide: insoluble [Ref.]
sulfuric acid: 16.3 (20°C) [Ref.]
water: 4.5 (0°C) [Ref.]
water: 9.6 (10°C) [Ref.]
water: 19.2 (20°C) [Ref.]
water: 27.9 (25°C) [Ref.]
water: 40.8 (30°C) [Ref.]
water: 49.8 (32°C) [Ref.]
water: 49.8 (38°C) [Ref.]
water: 48.4 (40°C) [Ref.]
water: 45.3 (60°C) [Ref.]
water: 43.3 (80°C) [Ref.]
water: 42.3 (100°C) [Ref.]

Properties of solutions:

10% (wt.), solvent - water
  Dynamic viscosity (mPa·s) = 1.39 (20°)
  Density (g/cm3) = 1.0905 (20°)
  Index of refraction = 1.3479 (20°)
0,017% (wt.), solvent - methanol
  Density (g/cm3) = 0.81 (20°)

Density:

2.7 (20°C, g/cm3)

Reactions:

  1. [Ref.1]
    Na2SO4 + 2F2 → 2NaF + SO2F2 + O2
  2. [Ref.1]
    Na2SO4 + 3S2Cl2 → 2SO2Cl2 + 2NaCl + 5S

Surface tension (mN/m):

195 (900°C)
190 (950°C)
188 (1000°C)
185 (1080°C)

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

-1384.6 (s)

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

-1266.8 (s)

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

149.5 (s)

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

127.3 (s)

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

24.3

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

-1070 (g)

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

345 (g)

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

105 (g)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 1016-1024
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1300-1315
  3. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 166-167 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 204 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 85 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 670 [Russian]
  7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 142-143 [Russian]
  8. Справочник экспериментальных данных по растворимости солевых систем. - Т. 3. - Л.: ГНТИХЛ, 1961. - pp. 1606-1644 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru