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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):
CHNaO
3
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/cm
3
) = 1.0125 (20°)
Density (g/cm
3
) = 1.013 (50°)
4% (wt.), solvent - water
Density (g/cm
3
) = 1.028 (18°)
6% (wt.), solvent - water
Dynamic viscosity (mPa·s) = 1.185 (20°)
Density (g/cm
3
) = 1.0408 (20°)
Index of refraction = 1.3409 (20°)
Freezing point (°C) = -2.26
8% (wt.), solvent - water
Density (g/cm
3
) = 1.0581 (18°)
10% (wt.), solvent - water
Density (g/cm
3
) = 1.069 (50°)
12% (wt.), solvent - water
Density (g/cm
3
) = 1.084 (50°)
Density:
2.16 (20°C, g/cm
3
)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-947.7 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-851.9 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
102 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
87.61 (s)
References:
Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 210-211
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1194-1214
Крашенинников С.А. Технология кальцинированной соды и очищенного бикарбоната натрия. - 3-е изд. - М.: Высшая школа, 1985. - pp. 246-274 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 666 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 144-145, 266 [Russian]
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