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Properties of substance:

sodium hydrogen phosphate dodecahydrate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

H25Na2O16P

Structural formula as text:

Na2HPO4 * 12H2O

Molar/atomic mass: 358.14

Decomposition temperature (°C):

35

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
water: 1.63 (0°C) [Ref.]
water: 3.9 (10°C) [Ref.]
water: 7.66 (20°C) [Ref.]
water: 12.14 (25°C) [Ref.]
water: 24.2 (30°C) [Ref.]
water: 55.1 (40°C) [Ref.]
water: 80.2 (50°C) [Ref.]
water: 82.9 (60°C) [Ref.]
water: 92.4 (80°C) [Ref.]
water: 104.1 (100°C) [Ref.]

Density:

1.52 (20°C, g/cm3)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

-5298 (s) [Ref.]

Standard molar entropy S (298 K, J/(mol·K))

636 (s) [Ref.]

Molar heat capacity at constant pressure Cp (298 K, J/(mol·K))

645 (s) [Ref.]

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 86 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru