(浙江选考)2019高考化学二轮增分策略加试30题专练(二)电解原理应用.doc

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1加试 30 题专练(二) 电解原理应用1工业上还可用电解浓 NaOH 溶液的方法制备 Na2FeO4。电解浓 NaOH 溶液制备 Na2FeO4,其工作原理如图所示。阳极的电极反应式是_;可循环使用的物质是_,理由是_。答案 Fe6e 8OH =FeO 4H 2O NaOH 溶液 水电离的 H 在阴极放电:242H 2e =H2, c(OH )增大,Na 通过阳离子交换膜进入阴极区,使阴极区 c(NaOH)增大,故可以循坏使用2在酸性电解质溶液中,以惰性材料作电极,将 CO2转化为丙烯的原理如下图所示:(1)太阳能电池的负极是_(填“a”或“b”)。(2)生成丙烯的电极反应式是_。2答案 (1)a (2)3CO 218H 18e =C3H66H 2O3利用如图所示装置(电极均为惰性电极)可吸收 SO2,则电极反应式为(1)阴极:_;(2)阳极:_。答案 (1) 2HSO 2H 2e =S2O 2H 2O 3 24(2)SO22H 2O2e =SO 4H 24

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