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Properties of substance:

potassium formate

Synonyms:

potassium methanoate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

CHKO2

Structural formula as text:

HCOOK

Molar/atomic mass: 84.116

Melting point (°C):

168.7

Decomposition temperature (°C):

170

Solubility (g/100 g of solvent):

diethyl ether: insoluble [Ref.]
ethanol: soluble [Ref.]
formic acid: 57 (0°C) [Ref.]
formic acid: 61.8 (19.5°C) [Ref.]
formic acid: 68.9 (39.5°C) [Ref.]
formic acid: 78.6 (60°C) [Ref.]
formic acid: 108.8 (90°C) [Ref.]
water: 331 (18°C) [Ref.]
water: 657 (80°C) [Ref.]

Hygroscopic:

yes

Density:

1.91 (20°C, g/cm3)

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

-661.1 (s) [Ref.]

Enthalpy (heat) of fusion ΔfusH (kJ/mol)

11.8 (s) [Ref.]

Enthalpy (heat) of solution ΔsolH (kJ)

2.76 (s) [Ref.]

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-19
  2. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.43
  3. Dictionary of Inorganic Compounds. - Vol. 1: Ac-C10, part 1. - Springer Science+Business Media Dordrecht, 1992. - pp. 415
  4. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 132-133 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 179 [Russian]
  6. Хёрд Ч.Д. Пиролиз соединений углерода. - Л.-М.: ГОНТИ РКТП СССР, 1938. - pp. 466 [Russian]
  7. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 234-235 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru