某地区的湖水中可能含有K+、NH4+、Fe3+、Al3+、Mg2+、CO32﹣、S2O32﹣、SO42﹣中的若干种，某研究小组为确定其成分，设计并完成了如下的实验：已知：Ag2SO4+4S2O32﹣═_刷题宝

题干

某地区的湖水中可能含有K⁺、NH₄⁺、Fe³⁺、Al³⁺、Mg²⁺、CO₃²^﹣、S₂O₃²^﹣、SO₄²^﹣中的若干种，某研究小组为确定其成分，设计并完成了如下的实验：

已知：Ag₂SO₄+4S₂O₃²^﹣═2[Ag（S₂O₃）₂]³^﹣+SO₄²^﹣、Ag₂CO₃+4S₂O₃²^﹣═2[Ag（S₂O₃）₂]³^﹣+CO₃²^﹣则下列说法中正确的是（　　）

A：试样溶液中肯定存在S₂O₃²^﹣、CO₃²^﹣，可能含有NH₄⁺、Al³⁺、K⁺

B：沉淀1的成分肯定为BaSO₄和S的混合物

C：将少量气体1通入溶液2中肯定会产生白色沉淀

D：取少量溶液1滴加KSCN溶液，溶液显红色

上一题下一题 0.0难度选择题更新时间:2019-08-27 08:12:28

答案(点此获取答案解析）

C

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