THERMODYNAMIC ANALYSES FOR S-H2O SYSTEM AT 25℃
来源期刊：中国有色金属学报(英文版)1997年第1期
论文作者：Yi Qingfeng Chen Qiyuan Zhang Hengzhong Zhang Pingmin
文章页码：28 - 33
Key words：potential pH diagram； thermodynamics； S-H 2O system ；sulfur
Abstract: A new type of potential pH diagram and distribution curves X(i) pH of aqueous species for the S-H 2O system have been reported and discussed according to overall equilibrium principle. The stable region of elemental sulfur is dependent on total sulfur concentration C t(S) of all species in solution and partial pressure p H 2S / p 0 of H 2S gas. When p H 2S / p 0 =10 -6 and C t(S)=1 mol/L, the stable range of sulfur disappears. Dominant region of S 2- 5 ion in the solution corresponds to stable region of solid sulfur in E h pH diagram. This type of E h pH diagrams and distribution curves of aqueous species are of both theoretical and practical importance.
