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Properties of substance:

potassium dihydrogen arsenate

Group of substances:

inorganic

Physical appearance:

colorless tetragonal crystals

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

H2AsKO4

Structural formula as text:

KH2AsO4

Molar/atomic mass: 180.033

Melting point (°C):

288

Solubility (g/100 g of solvent):

ethanol: insoluble [Ref.]
glycerol: 50.1 (15°C) [Ref.]
water: 18.86 (6°C) [Ref.]
water: 28 (20°C) [Ref.]

Density:

2.87 (20°C, g/cm3)

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

-1183.4 (s)

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

155.5 (s)

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

126.7 (s)

References:

  1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 299
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 682
  3. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 126-127 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru