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Properties of substance:

sodium phosphate

Group of substances:

inorganic

Physical appearance:

colorless tetragonal crystals

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

Na3O4P

Structural formula as text:

Na3PO4

Molar/atomic mass: 163.94

Melting point (°C):

1340

Solubility (g/100 g of solvent):

ethylene glycol : soluble with solvolysis [Ref.]
sulfuric acid: solvolysis [Ref.]
water: 5.4 (0°C) [Ref.]
water: 14.5 (25°C) [Ref.]
water: 23.3 (40°C) [Ref.]
water: 54.3 (60°C) [Ref.]
water: 68 (80°C) [Ref.]
water: 94.6 (100°C) [Ref.]

Properties of solutions:

8% (wt.), solvent - water
  Dynamic viscosity (mPa·s) = 1.729 (20°)
  Density (g/cm3) = 1.0961 (20°)
  Index of refraction = 1.3532 (20°)

Density:

2.536 (17.5°C, g/cm3)

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

-1935.5 (s)

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

-1819 (s)

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

224.7 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1287
  2. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 168-169 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 85 [Russian]
  4. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 146-147 [Russian]
  5. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 363 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru