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关注：1
2013-05-23 12:21
求翻译：Usually, completion of the reaction is indicated by a sudden, visible change in the reaction system that coincides with the stoichimetric relationship between moles or equivalents of the reagent solution and the reactant in the test solution. A drop or two of an appropriate indicator solution produces a colour change a是什么意思？ 待解决
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Usually, completion of the reaction is indicated by a sudden, visible change in the reaction system that coincides with the stoichimetric relationship between moles or equivalents of the reagent solution and the reactant in the test solution. A drop or two of an appropriate indicator solution produces a colour change a
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