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离子共存

> 常温下，下列各组离子在指定溶液中能大量共存的是 [ ] A．pH=2的溶液中：Fe 3+、Na +、I -、HCO 3 - B．强酸性溶液中：Fe 2+、Na +、SO 4 2-、NO 3 - C．在c(H +)/c(OH -)=10 10的溶液中：NH 4 +、K +、HCO 3 -、Cl - D．加入石蕊呈红色的溶液中：NH 4 +、Mg 2+、NO 3 -、SO 4 2-

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发布时间：2024-09-08

常温下，下列各组离子在指定溶液中能大量共存的是
[ ]
A．pH=2的溶液中：Fe ³⁺、Na ⁺、I ^-、HCO ₃ ^-B．强酸性溶液中：Fe ²⁺、Na ⁺、SO ₄ ^2-、NO ₃ ^-C．在c(H ⁺)/c(OH ^-)=10 ¹⁰的溶液中：NH ₄ ⁺、K ⁺、HCO ₃ ^-、Cl ^-D．加入石蕊呈红色的溶液中：NH ₄ ⁺、Mg ²⁺、NO ₃ ^-、SO ₄ ^2-

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