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报道了离子选择电极电位法测定电解质从水向质量分数为0.40的乙醇-水中的标准迁移自由能△G~θ(MX)(MX=NaF,NaCl,NaBr,NaI,LiCl,HCl)。根据△G~θ_t(NaF)和△G~θ_t(NaCl)的直线外推所计算的单个离子的迁移自由能△G~θ(i)与碱金属氯化物的△_tG~θ(MCl)外推所计算的相当一致。本文明确证明了由于Cl~-是硬碱而I~-是软碱根据3个大卤素离子的△_tG~θ(MX)作图的Feakins外推法计算△_tG~θ(i)是错误的方法,而用硬碱和硬酸的△_tG~θ(MX)的外推法都是正确的。
Reported the standard migration free energy ΔG ~ θ (MX) (MX = NaF, NaCl, NaBr, NaI, LiCl, HCl) in the ethanol-water with the mass fraction of 0.40. According to the linear extrapolation of △ G ~ θ_t (NaF) and △ G ~ θ_t (NaCl), the calculated free energy ΔG ~ θ (i) of single ion and △ _tG ~ θ (MCl) of alkali metal chloride Push calculations fairly consistent. This paper clearly proves that △ _tG ~ θ (i) is wrong due to Feakins extrapolation of △ _tG ~ θ (MX) of three large halogens due to the fact that Cl ~ - is a hard base and I ~ Method, and extrapolation of ΔtG ~ θ (MX) with hard and hard acids is correct.