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离子共存

> 下列各组离子可能大量共存的是（　　） A．含有大量NO3-的澄清透明溶液中：K+、Cu2+、Cl-、Na+ B．能与金属铝反应放出氢气的溶液中：K+、NO3-、Cl-、NH4+ C．常温下水电离出的c（H+）•c（OH-）=10-20的溶液中：Na+、HCO3-、SO42-、Cl- D．pH=7的溶液：Fe3+、Mg2+、SO42-、Cl-

问题：

发布时间：2024-09-10

下列各组离子可能大量共存的是（　　）

A．含有大量NO₃^-的澄清透明溶液中：K⁺、Cu²⁺、Cl^-、Na⁺

B．能与金属铝反应放出氢气的溶液中：K⁺、NO₃^-、Cl^-、NH₄⁺

C．常温下水电离出的c（H⁺）•c（OH^-）=10^-20的溶液中：Na⁺、HCO₃^-、SO₄^2-、Cl^-

D．pH=7的溶液：Fe³⁺、Mg²⁺、SO₄^2-、Cl^-

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