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酸和碱怎么区别
更新时间: 2020-09-23 00:00:00  

酸电离时产生的阳离子全部是氢离子,碱电离时产生的阴离子全部都是氢氧根离子。

根据定义,区分酸碱的方法如下:

1、氢离子可使紫色石蕊变红色,氢氧根可使紫色石蕊变蓝,滴加紫色石蕊即可;

2、氢离子不能使无色酚酞变色,氢氧根离子可使无色酚酞变红色,滴加无色酚酞即可;

3、根据化学式区别,判断化学式中的阳离子是否都是氢离子或阴离子是否都是氢氧根离子。

关键词: 怎么 区别

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