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Properties of substance:

potassium phosphate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

K3O4P

Structural formula as text:

K3PO4

Molar/atomic mass: 212.27

Melting point (°C):

1340

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
ethylene glycol : soluble with solvolysis [Ref.]
formamide: 4.5 (25°C) [Ref.]
water: 79.4 (0°C) [Ref.]
water: 88.1 (10°C) [Ref.]
water: 98.5 (20°C) [Ref.]
water: 105.9 (25°C) [Ref.]
water: 113.1 (30°C) [Ref.]
water: 135.3 (40°C) [Ref.]
water: 178.5 (60°C) [Ref.]

Hygroscopic:

yes

Density:

2.564 (17°C, g/cm3)

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

-1988 (s)

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

212 (s)

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

165 (s)

References:

  1. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 70 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru