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离子共存

> 下列各组离子在指定条件下，一定能大量共存的是（　　） A．pH为1的无色溶液：K+、Fe2+、NO3-、Cl- B．强碱性的溶液：Na+、Al3+、S2-、Br- C．pH为3的溶液：Ba2+、Na+、NO3-、Cl- D．加入铝条有氢气放出的溶液：Na+、NH4+、HCO3-、SO42-

问题：

发布时间：2024-09-13

下列各组离子在指定条件下，一定能大量共存的是（　　）

A．pH为1的无色溶液：K⁺、Fe²⁺、NO₃^-、Cl^-

B．强碱性的溶液：Na⁺、Al³⁺、S^2-、Br^-

C．pH为3的溶液：Ba²⁺、Na⁺、NO₃^-、Cl^-

D．加入铝条有氢气放出的溶液：Na⁺、NH₄⁺、HCO₃^-、SO₄^2-

参考答案：

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下列各组离子在指定条件下，一定能大量共存的是（ ） A．pH为1的无色溶液：K+、Fe2+、NO3-、Cl- B．强碱性的溶液：Na+、Al3+、S2-、Br- C．pH为3的溶液：Ba2+、Na+、NO3-、Cl- D．加入铝条有氢气放出的溶液：Na+、NH4+、HCO3-、SO42-

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