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纵观近几年全国理综试卷及各地高考理综卷的化学实验题,我们不难发现实验题在各方面都发生了新的变化,突出表现在将实验原理、设计、计算、评价、推断融合其中,把能力的考查提升到一个新的高度。笔者仪对2013年浙江省高考理综化学第28题展开分析,找出试题的特点,以期获得对今后高考化学实验教学及复习备考的几点想法。一、高考原题题目.利用废旧锌铁皮制备磁性Fe_3o_4胶体粒子及副产物Zno,制备流程如附图所示。
Throughout the past few years, the National Science Comprehensive Test Paper and the National Science Entrance Examination of the comprehensive chemical experiment, we can easily find the experimental questions in all aspects of the new changes have taken place, highlighted in the experimental principle, design, calculation, evaluation, inference Fusion of them, the ability test to a new level. The author of the 2013 Zhejiang Provincial College Entrance Examination Chemistry comprehensive analysis of the first 28 questions, identify the characteristics of the questions, in order to obtain the next college entrance examination of chemical experiments and review of several ideas. First, the original title of the college entrance examination. The use of scrap zinc metal magnetic Fe_3o_4 colloidal particles and byproducts Zno preparation process shown in the figure.