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Properties of substance:

potassium hydrogen sulfate

Synonyms:

potassium bisulfate

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

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

HKO4S

Structural formula as text:

KHSO4

Molar/atomic mass: 136.16

Melting point (°C):

218.6

Decomposition temperature (°C):

300

Solubility (g/100 g of solvent):

acetone: insoluble [Ref.]
ethanol: insoluble [Ref.]
formic acid 95%: 14.5 (19.3°C) [Ref.]
water: 37 (0°C) [Ref.]
water: 53 (20°C) [Ref.]
water: 70 (40°C) [Ref.]
water: 76.4 (60°C) [Ref.]
water: 121.7 (100°C) [Ref.]

Hygroscopic:

yes

Density:

2.5 (20°C, g/cm3)

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

-1158.1 (s)

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

-1043.5 (s)

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

142 (s)

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

18

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 132-133 [Russian]
  2. Краткий справочник по химии. - Под ред. Куриленко О.Д. - Киев: Наукова думка, 1974. - pp. 144-145 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 69 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 162, 699 [Russian]
  5. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 232 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru