End of the reaction can be identified by the fact that when adding zinc sulfide into a test tube containing a little reaction solution, and sway the test tube and no yellow deposition can be seen.

用试管取少量反应溶液，往试管内加入硫化锌并摇晃，无黄色沉淀生成即为终点。

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End of the reaction can be identified by the fact that when adding zinc sulfide into a test tube containing a little reaction solution, and sway the test tube and no yellow deposition can be seen.

用试管取少量反应溶液，往试管内加入硫化锌并摇晃，无黄色沉淀生成即为终点。

youdao