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离子共存

> 常温下，加水冲稀时c(H ＋)/c(OH －)的值明显减小的溶液中，一定能大量共存的离子组是 [ ] ①K ＋、Cl －、NO 3 －、CH 3COO －　②K ＋、Fe 2＋、I －、SO 4 2－　③Ba 2＋、Cl －、NO 3 －、Na ＋　④Na ＋、Ca 2＋、Cl －、HCO 3 －　⑤K ＋、SO 3 2－、Cl －、NO 3 － A．②③　　 B．①③⑤　　 C．②④　　 D．②③⑤

问题：

发布时间：2024-09-09

常温下，加水冲稀时c(H ^＋)/c(OH ^－)的值明显减小的溶液中，一定能大量共存的离子组是
[     ]
①K ^＋、Cl ^－、NO ₃ ^－、CH ₃COO ^－　②K ^＋、Fe ^2＋、I ^－、SO ₄ ^2－　③Ba ^2＋、Cl ^－、NO ₃ ^－、Na ^＋　④Na ^＋、Ca ^2＋、Cl ^－、HCO ₃ ^－　⑤K ^＋、SO ₃ ^2－、Cl ^－、NO ₃ ^－A．②③　　
B．①③⑤　　
C．②④　　
D．②③⑤

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