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为什么不能用EDTA络合滴定法直接测定铝

2025-03-15 02:29:24

推荐回答（1个）

回答1：

1、由于铝离子与edta配位速度太慢，需要加入过量的edta，并加热煮沸，配位反应才比较完全。
2、缺少直接滴定的指示剂。
3、在酸度不高时，铝离子水解生成一系列多核羟基配合物，它们与edta反应缓慢，配位叮法耻盒侪谷抽贪处楷比不恒定，不利于滴定。
所以常用返滴定法测定铝

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