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应用一价阳离子选择电极和氯离子选择电极组成可逆电池．通过测定电池的电动势，根据溶液热力学原理，引用扩展的Ｄｅｂｙｅ－Ｈüｃｋｅｌ公式，计算求得了ＲｂＣｌ在（Ｈ２Ｏ～ＤＭＦ）混合溶剂中的活度系数，一级、二级和总介质效应．并对ＲｂＣｌ的介质效应进行了讨论．
A reversible cell is composed of a monovalent cation selective electrode and a chloride ion selective electrode. The activity coefficient, primary, secondary and total media effects of RbCl in (H2O ~ DMF) mixed solvent were calculated by measuring the electromotive force of the battery according to the solution thermodynamics principle and by using the extended Debye-Hückel formula. The media effect of RbCl was also discussed.