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Properties of substance:

sodium hydrogen carbonate

Synonyms:

sodium bicarbonate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

CHNaO3

Structural formula as text:

NaHCO3

Molar/atomic mass: 84.01

Decomposition temperature (°C):

50

Solubility (g/100 g of solvent):

acetone: insoluble [Ref.]
ethanol 40%: 1.2 (15.5°C) [Ref.]
ethyl acetate: insoluble [Ref.]
glycerol 98.5%: 7.86 (20°C) [Ref.]
methanol: 2.13 (22°C) [Ref.]
methanol: 0.92 (50°C) [Ref.]
methyl acetate: insoluble [Ref.]
water: 6.9 (0°C) [Ref.]
water: 7.41 (5°C) [Ref.]
water: 8.2 (10°C) [Ref.]
water: 9.6 (20°C) [Ref.]
water: 10.4 (25°C) [Ref.]
water: 11.1 (30°C) [Ref.]
water: 12.7 (40°C) [Ref.]
water: 16.4 (60°C) [Ref.]
water: 20.2 (80°C) [Ref.]
water: 24.3 (100°C) [Ref.]

Properties of solutions:

2% (wt.), solvent - water
  Density (g/cm3) = 1.0125 (20°)
  Density (g/cm3) = 1.013 (50°)
4% (wt.), solvent - water
  Density (g/cm3) = 1.028 (18°)
6% (wt.), solvent - water
  Dynamic viscosity (mPa·s) = 1.185 (20°)
  Density (g/cm3) = 1.0408 (20°)
  Index of refraction = 1.3409 (20°)
  Freezing point (°C) = -2.26
8% (wt.), solvent - water
  Density (g/cm3) = 1.0581 (18°)
10% (wt.), solvent - water
  Density (g/cm3) = 1.069 (50°)
12% (wt.), solvent - water
  Density (g/cm3) = 1.084 (50°)

Density:

2.16 (20°C, g/cm3)

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

-947.7 (s)

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

-851.9 (s)

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

102 (s)

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

87.61 (s)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 210-211
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1194-1214
  3. Крашенинников С.А. Технология кальцинированной соды и очищенного бикарбоната натрия. - 3-е изд. - М.: Высшая школа, 1985. - pp. 246-274 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 666 [Russian]
  6. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 144-145, 266 [Russian]
  7. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 362 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru