Abstract: The preparation of saturated liquid aromatic hydrocarbons by circulation of solute vapour and the solubility of liquid aromatic hydrocarbons in silver nitrate solution are reported. Complex formation constants between those liquid aromatic hydrocarbons and silver ion were calculated from solubilities.The preparation apparatus was designed for preparing saturated vapour of solid aromatic hydrocarbons and we determined the solubilities of naphthalene, phenanthrene, anthracene biphenyl, p-dichlorobenzene in silver nitrate solution and calculated the complex formation costants between those substances and silver ion.

Key words: Solid aromatic hydrocarbons, Silver ion, Circulation of solute vapour, Complex forma-tion constants