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Q 二苯胺磺酸钠为什么会变紫色？

Question time：1/6/2021 4:04:54 PM

Describe：二苯胺磺酸钠为什么会变紫色？

A
1329219489@qq.com 2021-01-06 16:05
变色的原理是终点前二价铁被滴定剂氧化，终点后过量的滴定剂氧化指示剂，使其从无色变为紫色。

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