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离子共存

> 某未知溶液中已检验出含有离子Ca 2+、NO 3 -，且pH=2。欲检验此溶液中是否大量存在以下6种离子： ①ClO - ②NH 4 + ③Fe 3+ ④I - ⑤AlO 2 - ⑥Cl -，其中不必检验就能加以否定的离子是 [ ] A．③⑤⑥ B．④⑤⑥ C．①③④ D．①④⑤

问题：

发布时间：2024-09-07

某未知溶液中已检验出含有离子Ca ²⁺、NO ₃ ^-，且pH=2。欲检验此溶液中是否大量存在以下6种离子：
①ClO ^- ②NH ₄ ⁺ ③Fe ³⁺ ④I ^- ⑤AlO ₂ ^- ⑥Cl ^-，其中不必检验就能加以否定的离子是
[ ]
A．③⑤⑥
B．④⑤⑥
C．①③④
D．①④⑤

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