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82问答网 > 用edta法怎样测出水的总硬度？选用什么指示剂？终点颜色如何变化

用edta法怎样测出水的总硬度？选用什么指示剂？终点颜色如何变化

2025-03-16 08:18:00

推荐回答（1个）

回答1：

共3点1.铬黑T配成溶液以方便使用准备室为每组准备一只干净的5L塑料桶作采水样用准备室为每组准备一只干净的5L塑料桶作采水样用
2.本实验终点不够敏锐，特别是滴定钙。强调近终点要慢滴，每滴1滴后都要充分摇匀，直至纯蓝色为止，可作示范。
3.用EDTA测定测定水的总硬度及钙镁含量时，要控制好pH，并注意好终点颜色变化，以防止滴过。
祝你学习进步望采纳 ~

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