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85问答库 > Na2CO3溶液的离子浓度大小顺序是什么？

Na2CO3溶液的离子浓度大小顺序是什么？

说说理由，最主要我不知道HCO3-与OH-的浓度哪个大

2025-03-24 09:42:06

推荐回答（2个）

回答1：

H20<=========>H+ +OH-
CO32-<======>HCO3- +OH-
HCO3- <==========>H2CO3+OH-

OH-的浓度大

回答2：

碳酸钠由于水解呈碱性说明OH->H+
那么 Na+>CO3 2-
水解公式是 CO3 2- + H2O = HCO3- +OH-
由于水解程度很小
所以 CO3 2- >HCO3-
所以Na+ >CO3 2- > OH- > HCO3- >H+

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