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Properties of substance:

sodium hydrogen phosphate dihydrate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

H5Na2O6P

Structural formula as text:

Na2HPO4 * 2H2O

Molar/atomic mass: 177.989

Decomposition temperature (°C):

95

Density:

2.07 (16°C, g/cm3)

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

-2346 (s)

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

221 (s)

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

211.3 (s)

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 168-169 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru