在允许加热的条件下,只用一种试剂就可以鉴别硫酸铵、氯化  钾、

在允许加热的条件下,只用一种试剂就可以鉴别硫酸铵、氯化  钾、氯化镁、硫酸铝和硫酸铁溶液,这种试剂是         (   )

A.NaOH        B.NH3·H2O       C. AgNO3       D. BaCl2

 

答案

A

解析:加入氢氧化钠各种溶液中的现象分别为产生刺激性的气体、无现象、白色沉淀、先生成白色沉淀然后又溶解、红褐色沉淀。A正确。

 

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