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离子共存

> 在某未知溶液中检验出含有Ba 2+、NO 3 －，且溶液的pH＝1。某学生还需鉴定此溶液中是否大量存在：①Al 3+；②NH 4 +；③Fe 2+；④Cl －；⑤AlO 2 －；⑥SO 4 2－，其实这些离子中有一部分不必再鉴定就能加以否定，你认为不必再鉴定的离子组是 [ ] A．③⑤⑥ B．④⑤⑥ C．①②⑤ D．①③④

问题：

发布时间：2024-09-07

在某未知溶液中检验出含有Ba ²⁺、NO ₃ ^－，且溶液的pH＝1。某学生还需鉴定此溶液中是否大量存在：①Al ³⁺；②NH ₄ ⁺；③Fe ²⁺；④Cl ^－；⑤AlO ₂ ^－；⑥SO ₄ ^2－，其实这些离子中有一部分不必再鉴定就能加以否定，你认为不必再鉴定的离子组是
[     ]
A．③⑤⑥
B．④⑤⑥
C．①②⑤
D．①③④

参考答案：

提问用户：eh***Bm9

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