盐溶于水 怎么看是对水的电离是促进还是抑制 到什么时候水的电离程度最大

2025-04-08 07:53:28
推荐回答(2个)
回答(1):

一般的可以理解为弱酸盐比较促进水的电离,比如碳酸盐和醋酸盐,碳酸根离子结合水电解出的氢离子生成碳酸氢根离子,比较特殊是是NH4+,这个离子可以结合水电解出的氢氧根离子,形成比较稳定的NH3*H2O,这个也是促进水的电离反应的
总上所述,对水的电离影响的主要是盐发生了水解反应,如果水解反应消耗H+和OH-则促进水电解,而生成H+和OH-则抑制。
所以强碱、强酸以及强碱强酸盐对水的电离没有影响

回答(2):

看它在电离过程中是否与水发生反应,也就是是否是水解。
比如NaOH,电离过程不与水反应,是抑制;而NaAlO2,电离方程需要一个H2O分子,是促进。
水的电离程度最大……强水解物质浓度大约0.1mol/L?这个不是很清楚……反正不能过稀也不能过浓。

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