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强碱滴弱酸为什么用酚酞
更新时间: 2020-10-28 00:00:00  

强碱滴弱酸用酚酞误差较小。酚酞是指一种化学成品,属于晶体粉末状,几乎不溶于水。其特性是在酸性和中性溶液中为无色,在碱性溶液中为紫红色。常被人们用来检测酸碱。

酚酞在酸性和中性溶液中为无色,在碱性溶液中为紫红色,极强酸性溶液中为橙色,极强碱性溶液中无色。当加热到分解就散发出刺鼻的烟雾和刺激性烟雾。

关键词: 强碱 弱酸 为什么 酚酞

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