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Properties of substance:

iodic acid

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

HIO3

Structural formula as text:

HIO3

Molar/atomic mass: 175.91

Melting point (°C):

110

Solubility (g/100 g of solvent):

acetic acid: insoluble [Ref.]
carbon disulphide: insoluble [Ref.]
chloroform: insoluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol abs.: insoluble [Ref.]
sulfuric acid: soluble [Ref.]
water: 236.7 (0°C) [Ref.]
water: 253.4 (16°C) [Ref.]
water: 280.2 (40°C) [Ref.]
water: 360.8 (100°C) [Ref.]

Density:

4.63 (0°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    I2O5 + H2O → 2HIO3

Reactions:

  1. [Ref.1aster]
    3HIO3 → I2O5 * HIO3 + H2O
    2I2O5 * HIO3 → 4I2O5 + H2O

Dissociation:

pKa (1) = 0.72 (18°C, water)
pKa (1) = 0.77 (25°C, water)

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

-243.1 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 581
  2. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 208 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 66 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 346 [Russian]
  5. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 78 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru