测pH时,为什么要按从稀到浓的次序进行?
测pH时,为什么要按从稀到浓的次序进行?
数学人气：754 ℃时间：2020-03-29 02:22:54
优质解答
由稀到浓的话,因为后面一个始终浓度大于前面一个,所以要是用PH测试笔从稀的出来再放到浓的里,影响不大.但要是从浓到稀,笔从浓的出来再到稀的里,则笔上的浓度不会下降很多,影响稀的溶液的测试.
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