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Properties of substance:

sodium tungstate



skc-file

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

Na2O4W

Structural formula as text:

Na2WO4

Molar/atomic mass: 293.83

Melting point (°C):

696

Decomposition temperature (°C):

1200

Solubility (g/100 g of solvent):

water: 57.5 (0°C) [Ref.]
water: 72.1 (10°C) [Ref.]
water: 73 (20°C) [Ref.]
water: 77.9 (40°C) [Ref.]
water: 90.1 (80°C) [Ref.]
water: 96.8 (100°C) [Ref.]

Density:

4.18 (20°C, g/cm3)

    Surface tension (mN/m):

    201 (750°C)
    197 (800°C)
    191 (900°C)
    184 (1000°C)
    170 (1200°C)
    156 (1400°C)
    141 (1600°C)

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

    -1548 (s)

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

    161 (s)

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

    139.7 (s)

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

    23.8

    LD50 (mg/kg):

    240 (mice, oral)

    References:

    1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 4052
    2. Seidell A. Solubilities of inorganic and organic substances. - 2ed. - New York: D. Van Nostrand Company, 1919. - pp. 675
    3. Каров З.Г., Мохосоев М.В. Растворимость и свойства растворов соединений молибдена и вольфрама. - Новосибирск: ВО Наука, 1993. - pp. 319-325 [Russian]
    4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
    5. Сонгина О.А. Редкие металлы. - 3 изд. - М.: Металлургия, 1964. - pp. 60 [Russian]
    6. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советсткая энциклопедия, 1983. - pp. 361 [Russian]
    7. Химия и технология редких и рассеянных элементов. - Ч.3. - М.: Высшая школа, 1976. - pp. 230-231 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru