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Properties of substance:

silver iodide

Group of substances:

inorganic

Physical appearance:

yellow cubic crystals

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

AgI

Structural formula as text:

AgI

Molar/atomic mass: 234.77

Melting point (°C):

554

Decomposition temperature (°C):

554

Solubility (g/100 g of solvent):

acetic acid: practically insoluble [Ref.]
acetone: 0.00000000032 (25°C) [Ref.]
ammonia liquid : 531 (0°C) [Ref.]
ammonia liquid : 206.84 (25°C) [Ref.]
benzonitrile: insoluble [Ref.]
carbon disulphide: insoluble [Ref.]
dimethylamine: very soluble [Ref.]
dimethylformamide: 0.04 (25°C) [Ref.]
ethanol: 0.0000000062 (25°C) [Ref.]
hydrogen fluoride : insoluble [Ref.]
methanol: 0.0000001923 (25°C) [Ref.]
methyl acetate: insoluble [Ref.]
methylamine: very soluble [Ref.]
piperidine: slow soluble [Ref.]
pyridine: 0.1 (10°C) [Ref.]
pyridine: 8.6 (121°C) [Ref.]
sulfur dioxide: 0.016 (0°C) [Ref.]
water: 0.0000003 (20°C) [Ref.]

Multicomponent solubility (in wt%):

acetone 96.518%, potassium iodide 0.68%, silver iodide 2.802%, 25 °C [Ref.]
acetone 93.73%, potassium iodide 1.25%, silver iodide 5.02%, 25 °C [Ref.]
water 55.4%, sodium iodide 32.85%, silver iodide 11.75%, 25 °C, separating phase: AgI [Ref.]
water 26.21%, sodium iodide 41.13%, silver iodide 32.66%, 25 °C, separating phase: AgI [Ref.]
water 23.27%, sodium iodide 41.83%, silver iodide 34.9%, 25 °C, separating phase: AgI + 2AgI * 2NaI * 7H2O [Ref.]
water 22.44%, sodium iodide 50.19%, silver iodide 27.37%, 25 °C, separating phase: 2AgI * 2NaI * 7H2O [Ref.]
water 30.72%, sodium iodide 59.73%, silver iodide 9.95%, 25 °C, separating phase: NaI [Ref.]
water 90.107%, hydrogen iodide 9.8%, silver iodide 0.093%, 25 °C [Ref.]
water 79.4%, hydrogen iodide 18.9%, silver iodide 1.7%, 25 °C [Ref.]
water 71.46%, hydrogen iodide 23.5%, silver iodide 5.04%, 25 °C [Ref.]
water 61.4%, hydrogen iodide 27.2%, silver iodide 11.4%, 25 °C [Ref.]
water 46.6%, hydrogen iodide 30.7%, silver iodide 22.7%, 25 °C [Ref.]
water 33.6%, hydrogen iodide 32.6%, silver iodide 33.8%, 25 °C [Ref.]
water 19.%, hydrogen iodide 37.1%, silver iodide 43.9%, 25 °C [Ref.]

Numerical data:

Interatomic distances (in pm): 254.46

Density:

5.71 (20°C, g/cm3)

Electrode potential:

AgI + e- → Ag + I-, E = -0.152 V (water, 25°C)

Dissociation:

pKsp (0) = 15.96 (20°C, water)

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

-61.9 (s)

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

-66.4 (s)

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

115.5 (s)

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

57 (s)

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

9.41

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

159.3 (g)

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

264.2 (g)

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

36.9 (g)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 831-833
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 56-59
  3. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 508-509 [Russian]
  4. Девяткин В.В., Ляхова Ю.М. Химия для любознательных, или о чем не узнаешь на уроке. - Ярославль: Академия Холдинг, 2000. - pp. 71-72 [Russian]
  5. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 259-263 [Russian]
  6. Пятницкий И.В., Сухан В.В. Аналитическая химия серебра. - М.: Наука, 1975. - pp. 24-25 [Russian]
  7. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 98 [Russian]
  8. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 198, 719-720 [Russian]
  9. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 206-207 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru