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Properties of substance:

silver cyanide

Group of substances:

inorganic

Physical appearance:

colorless trigonal crystals

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

CAgN

Structural formula as text:

AgCN

Molar/atomic mass: 133.89

Melting point (°C):

350

Solubility (g/100 g of solvent):

acetic acid: practically insoluble [Ref.]
nickel tetracarbonyl: insoluble [Ref.]
sulfur dioxide: 0.019 (0°C) [Ref.]
water: 0.000023 (20°C) [Ref.]

Multicomponent solubility (in wt%):

water 79.72%, potassium cyanide 6.75%, silver cyanide 13.53%, 25 °C, separating phase: AgCN [Ref.]
water 73.34%, potassium cyanide 8.93%, silver cyanide 17.73%, 25 °C, separating phase: KAg2(CN)3 * H2O [Ref.]
water 75.33%, potassium cyanide 8.56%, silver cyanide 16.11%, 25 °C, separating phase: KAg(CN)2 [Ref.]
water 58.2%, potassium cyanide 20.14%, silver cyanide 21.66%, 25 °C, separating phase: KAg(CN)2 [Ref.]
water 45.2%, potassium cyanide 28.43%, silver cyanide 26.37%, 25 °C, separating phase: KAg(CN)2 [Ref.]
water 39.63%, potassium cyanide 35.19%, silver cyanide 25.18%, 25 °C, separating phase: K3Ag(CN)4 * H2O [Ref.]
water 48.83%, potassium cyanide 40.24%, silver cyanide 10.93%, 25 °C, separating phase: KCN [Ref.]

Density:

3.95 (20°C, g/cm3)

Electrode potential:

AgCN + e- → Ag + CN-, E = -0.04 V (water, 25°C)

Dissociation:

pKsp (1) = 14.15 (25°C, water)

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

145.9 (s)

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

156.9 (s)

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

107.2 (s)

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

66.73 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

11.5

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 26-28
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 99 [Russian]
  3. Реми Г. Курс неорганической химии. - Т.2. - М., 1966. - pp. 435 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru