银离子与亚铁离子反应可逆性的热力学研究  

Thermodynamics Research on Reversibility of Reaction Between Silver Ions and Ferrous Ions

作　　者：王兆龙[1] WANG Zhao-Long(Jiamusi No.1 Middle School, Jiamusi 154002, China)

机构地区：[1]佳木斯市第一中学

出　　处：《化学教育（中英文）》2019年第13期89-90,共2页Chinese Journal of Chemical Education

摘　　要：以一道北京高考题为切入点,利用标准电极电势计算Ag^++Fe^2+=Ag+Fe^3+的平衡常数和电动势。运用能斯特方程,计算非标准状态下该反应的电动势,理论上证实逆反应可以实现。设计原电池装置,通过改变离子浓度,实现电流表指针的反转,验证该氧化还原反应确有可逆性。Base on the question of college entrance examination of Beijing, this paper calculated the electromotive force(EMF) and equilibrium constant of the reaction(Ag^++Fe^2+=Ag+Fe^3+) according to standard electrode potential, and calculated the nonstandard state electromotive force of the reaction, proved that its reverse reaction could be accomplished theoretically. Then this paper designed primary battery, and changed ion concentration to realize Ammeter pointer reverse deflection to verify reversibility of the reaction.

关 键 词：可逆的氧化还原反应 能斯特方程 标准电极电势 

分 类 号：G634.8[文化科学—教育学]