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Properties of substance:
sodium metasilicate
Synonyms:
sodium silicate
Group of substances:
inorganic
Physical appearance:
colorless rhombic crystals
Empirical formula (Hill's system for organic substances):
Na
2
O
3
Si
Structural formula as text:
Na2SiO3
Molar/atomic mass: 122.06
Melting point (°C):
1089
Solubility (g/100 g of solvent):
ethanol
: insoluble [
Ref.
]
water
: 18.8 (20°C) [
Ref.
]
water
: 22.2 (25°C) [
Ref.
]
water
: 34.5 (35°C) [
Ref.
]
water
: 56.7 (45°C) [
Ref.
]
water
: 93.5 (60°C) [
Ref.
]
water
: 160.6 (80°C) [
Ref.
]
Density:
2.61 (20°C, g/cm
3
)
Reactions:
[
Ref.1
]
4CuSO
4
+ 2Na
2
SiO
3
+ 6H
2
O → Cu
4
(OH)
6
SO
4
+ 2H
2
SiO
3
+ 2Na
2
SO
4
+ H
2
SO
4
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1525.4 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1427 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
113.8 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
111.8 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
52.3
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1528
LD
50
(mg/kg):
1153 (rats, oral)
770 (mice, oral)
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-90
Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 4043-4044
Schlager N., Weisblatt J., Newton D.E. Chemical Compounds. - 2006. - pp. 779-783
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 592 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 85 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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