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怎样用hno3鉴别mgi2,agno3,na2co3,naalo2四种溶液的试剂
人气:297 ℃ 时间:2020-03-19 22:00:19
解答
缓慢滴加HNO3:
有气泡产生的是Na2CO3;
先产生沉淀白色沉淀,后沉淀溶解的是NaAlO2;
溶液变黄的是MgI2;(有I2生成,碘水是黄的)
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