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碳酸氢钠呈酸性还是呈碱性

更新时间: 2020-07-03 00:00:00     

碳酸氢钠在水溶液中完全电离,得到钠离子和碳酸氢根离子,由于碳酸氢根离子会发生水解反应,有氢氧根生成,溶液呈碱性。

碳酸氢钠没有电解出氢离子,是因为碳酸氢根是弱酸酸根,无法完全电离,且水解程度大于电离程度所以氢氧根浓度大于氢离子。

关键词: 碳酸 酸性 还是 碱性

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