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Properties of substance:

mercury(I) chloride

Synonyms:

mercurous chloride

Group of substances:

inorganic

Physical appearance:

white tetragonal crystals

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

Cl2Hg2

Structural formula as text:

Hg2Cl2

Molar/atomic mass: 472.09

Sublimation point (°C):

383.7

Solubility (g/100 g of solvent):

acetone: very slightly soluble [Ref.]
bromoform: 0.055 (18°C) [Ref.]
diethyl ether: very slightly soluble [Ref.]
ethanol: very slightly soluble [Ref.]
ethyl acetate: insoluble [Ref.]
hydrazine: soluble with reaction 1 [Ref.]
phosphorus(V) trichloride oxide: very slightly soluble [Ref.]
water: 0.00014 (0.5°C) [Ref.]
water: 0.00021 (18°C) [Ref.]
water: 0.00028 (24.6°C) [Ref.]
water: 0.0007 (43°C) [Ref.]

Density:

7.15 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    Hg + HgCl2 → Hg2Cl2

Vapour pressure (Torr):

0.1 (161°C)
1 (199°C)
10 (247°C)
100 (309°C)

Electrode potential:

Hg2Cl2 + 2e- → 2Hg + 2Cl-, E = 0.268 V (water, 25°C)

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

-265.1 (s)

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

-210.8 (s)

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

192.76 (s)

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

99.91 (s)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 620-621
  2. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 208 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 93 [Russian]
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 294, 824 [Russian]
  5. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 276 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru