The preparation of zinc sulfate heptahydrate and copper sulfate pentahydrate from calcined zincblende was investigated.

用高温煅烧后的闪锌矿石与稀酸反应制备七水酸锌和五水酸铜。

Corrosively medium for chemical production such as sodium hydrate,caustic soda,sulfuric acid,nitric acid,acetic acid,fatty acid.

工生产品中的腐蚀性物料，如：烧碱、纯碱、浓稀酸、碳酸、醋酸等。

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.

结果表明只能溶于氢卤酸（除氢氟酸外）、稀酸与碱金属卤物的混合液中，不能溶于稀酸中。