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离子反应方程式是最基本和最重要的化学用语之一。从2015年10月开始的浙江高考(选考)试题看,离子方程式的考查从定性深入到定量,与“量”有关的离子方程式成为考查的热点,而学生对与“量”有关的离子方程式识记、辨别、理解和运用,存在畏惧心理,往往得分率较低。一、高考真题例1.(浙江选考2015年10月第25题)已知氧化性Br_2>Fe~(3+)。向含溶质a mol的FeBr_2溶液中通入b mol
Ion reaction equation is one of the most basic and important chemical terms. From the beginning of October 2015 Zhejiang college entrance examination (exam) examination questions, ion equation examination from qualitative to quantitative, with the “volume” of the ion equation has become a hot spot for examination, and students with the “volume” Relevant ion equation identification, identification, understanding and use, there is fear, often scoring rate is low. First, the entrance examination Zhenti cases 1. (Zhejiang selected test October 2015 No. 25) known oxidation Br_2> Fe ~ (3 +). To the solute containing a mol of FeBr_2 solution into the b mol