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离子共存

> 下列四组离子或分子在水溶液中，能大量共存的是 [ ] A．SO 4 2-、S 2-、OH -、Na + B．NH 3·H 2O、K +、Ag +、NO 3 - C．CH 3CHO、H 2O、Na +、NH 4 + D．Cr 2O 7 2-、Mg 2+、SO 4 2-、CH 3CH 2OH

问题：

发布时间：2024-09-11

下列四组离子或分子在水溶液中，能大量共存的是
[ ]
A．SO ₄ ^2-、S ^2-、OH ^-、Na ⁺ B．NH ₃·H ₂O、K ⁺、Ag ⁺、NO ₃ ^-C．CH ₃CHO、H ₂O、Na ⁺、NH ₄ ⁺
D．Cr ₂O ₇ ^2-、Mg ²⁺、SO ₄ ^2-、CH ₃CH ₂OH

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