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13问答网 > 在某无色溶液中，加入BaCl2溶液有白色沉淀，再加稀硝酸，沉淀不消失，则下列判断正确的是（　　）A．一定

在某无色溶液中，加入BaCl2溶液有白色沉淀，再加稀硝酸，沉淀不消失，则下列判断正确的是（　　）A．一定

2025-03-15 11:40:02

推荐回答（1个）

回答1：

在某无色溶液中，加入BaCl₂溶液有白色沉淀，该白色沉淀可以是氯化银、碳酸钡、硫酸钡、亚硫酸钡等，再加稀硝酸，沉淀不消失，所以沉淀是硫酸钡、亚硫酸钡、氯化银中的至少一种，亚硫酸钡和硝酸相遇，被硝酸氧化为硫酸钡，即原来无色溶液中可能有SO₄^2-或SO₃^2-或Ag⁺．
故选D．

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