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酸碱中和滴定酚酞用多了会怎么样
更新时间: 2020-09-18 00:00:00  

酚酞是指示剂,一般地加入2-3滴即可,加多了会影响测试结果,一般使测得结果偏高。

1、指示剂用量过多,还会影响变色的敏锐性。

2、指示剂是有机弱酸或有机弱碱,能和H+或OH-反应。加入指示剂过多时,滴定需要消耗的H+或OH-也变多,会使所测溶液的浓度计算值偏大。

关键词: 酸碱 中和 酚酞 怎么样

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