[题目]某无色气体A中可能含有Cl2.SO2.CO2.HCl气体中的一种或几种.(1)将此气体通入氯水后溶液变得无色透明.(2)将得到的溶液分为两份:①其中一份取出少量在试管中.加入用盐酸酸化的BaCl2溶液.出现白色沉淀.②另一份取出少量加入用硝酸酸化的AgNO3溶液.也得到白色沉淀.试回答:(1)气体A中肯定含有的气体是 .理由是 .(2)气体A中肯� 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】某无色气体A中可能含有Cl2、SO2、CO2、HCl气体中的一种或几种。

(1)将此气体通入氯水后溶液变得无色透明。

(2)将得到的溶液分为两份：①其中一份取出少量在试管中，加入用盐酸酸化的BaCl2溶液，出现白色沉淀。②另一份取出少量加入用硝酸酸化的AgNO3溶液，也得到白色沉淀。

试回答：

(1)气体A中肯定含有的气体是________，理由是____________。

(2)气体A中肯定不存在的气体是________，理由是__________。

(3)气体A中不一定存在的气体是________。

【答案】(1)SO2 气体通入氯水后溶液变得无色透明，且加入用盐酸酸化的BaCl2溶液，出现白色沉淀

(2)Cl2 Cl2为黄绿色气体

(3)CO2、HCl

【解析】无色气体说明一定不含Cl2；①实验说明一定含SO2，②实验说明含Cl，但氯水中含Cl，不确定含HCl。

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