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碳酸氢钠溶液中离子浓度的大小顺序是什么？为什么

2025-03-15 07:52:53

推荐回答（1个）

回答1：

NaHCO3在溶液中存在水解和电离，水解程度大于电离程度，溶液显碱性，其水解方程式为：
HCO3-+H2O?H2CO3+OH-，
NaHCO3溶液呈碱性，水解程度大于电离程度，c（OH-）＞c（H+），
所以离子浓度关系为：
c（Na+）＞c（HCO3-）＞c（OH-）＞c（H+）＞c（CO32-）；

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