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离子共存

> 下列溶液中，能够大量共存的离子组是（　　） A．使酚酞试液变红的溶液：Na+、Cl-、S0 2-4 、Fe3+ B．使紫色石蕊试液变红的溶液：Fe2+、Mg2+、N03-、Cl- C．c（H+）=10-12 mol•L-1的溶液：K+、Ba2+、Cl-、Br- D．pH=2的无色溶液：K+、S042-、Mn04-、Na+

问题：

发布时间：2024-09-10

下列溶液中，能够大量共存的离子组是（　　）

A．使酚酞试液变红的溶液：Na⁺、Cl^-、S0

2-4

、Fe³⁺

B．使紫色石蕊试液变红的溶液：Fe²⁺、Mg²⁺、N0₃^-、Cl^-

C．c（H⁺）=10^-12 mol•L^-1的溶液：K⁺、Ba²⁺、Cl^-、Br^-

D．pH=2的无色溶液：K⁺、S0₄^2-、Mn0₄^-、Na⁺

参考答案：

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