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由于离子交换树脂对各种反离子的吸取具有选择性,所以当两种离子达到离子交换平衡时,它们在水溶液中的浓度比和在树脂相中的浓度比是不一样的。离子交换平衡就是研究平衡时这些离子浓度的关系。
Since ion exchange resins are selective for various counterions, they are not identical in concentration in aqueous solution to that in resin phase when the two ions reach ion exchange equilibrium. Ion exchange equilibrium is the study of equilibrium ion concentration of these relationships.