It is studied further that the dissolubility of the bismuthous sulfide in the solutions of the non-oxidative strong acid through the experiment by means of chemical thermodynamics.

运用化学热力学基础理论和方法研究了硫化铋化酸和碱金属卤化物液中的解。

Which indubitably indicate that the bismuthous sulfide can only dissolve in halogen acid except hydrofluoric acid, the mixed solution of dilute sulfuric acid and alkali halide.

结果表明硫化铋只能于氢卤酸（除氢氟酸外）、稀硫酸与碱金属卤化物的混合液中，不能于稀硫酸中。