Experimenting with a Visible Copper-Aluminum Displacement Reaction in Agar Gel and Observing Copper Crystal Growth Patterns To Engage Student Interest and Inquiry

Xu Xinhua; Wu Meifen; Wang Xiaogang; Yang Yangyiwei; Shi Xiang; Wang Guoping

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Experimenting with a Visible Copper-Aluminum Displacement Reaction in Agar Gel and Observing Copper Crystal Growth Patterns To Engage Student Interest and Inquiry

机译：在琼脂凝胶中进行可见的铜-铝置换反应实验，观察铜晶体的生长方式，以引起学生的兴趣和询问

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The reaction process of copper aluminum displacement in agar gel was observed at the microscopic level with a stereomicroscope; pine like branches of copper crystals growing from aluminum surface into gel at a constant rate were observed. Students were asked to make hypotheses on the pattern formation and design new research approaches to prove their hypotheses. Results of the experiments designed by students well proved the existence of microcells in reaction system, which caused continuous growth of copper branches. The whole experimental teaching process motivated students by stimulating their interest and enthusiasm.

机译：用立体显微镜观察了琼脂凝胶中铜铝置换的反应过程。观察到铜晶体的松状分支以恒定的速率从铝表面生长到凝胶中。要求学生对模式形成进行假设，并设计新的研究方法以证明其假设。学生设计的实验结果很好地证明了反应系统中存在微孔，从而导致铜分支的连续生长。整个实验教学过程通过激发学生的兴趣和热情来激励他们。

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《Journal of Chemical Education》 |2016年第9期|共4页
作者
Xu Xinhua; Wu Meifen; Wang Xiaogang; Yang Yangyiwei; Shi Xiang; Wang Guoping;
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正文语种 eng
中图分类化学;
关键词
First -Year Undergraduate/General; High School/Introductory Chemistry; Laboratory Instruction; Interdisciplinary/Multidisciplinary; Hands-On Learning/Manipulatives; Inquiry-Based/Discovery Learning; Oxidation/Reduction; Electrochemistry;

机译：一年级本科/常规;高中/基础化学;实验室教学;跨学科/多学科;动手学习/操作;基于探究/发现的学习;氧化/还原;电化学;

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1. Experimenting with a Visible Copper-Aluminum Displacement Reaction in Agar Gel and Observing Copper Crystal Growth Patterns To Engage Student Interest and Inquiry [J] . Xu Xinhua, Wu Meifen, Wang Xiaogang, Journal of Chemical Education . 2016,第9期

机译：在琼脂凝胶中进行可见的铜-铝置换反应实验，观察铜晶体的生长方式，以引起学生的兴趣和询问
2. Reply to comment on "Spectator ions ARE important! A Kinetic Study of the copper-aluminum displacement reaction" [J] . Sobel S.G. Journal of Chemical Education . 2011,第1期

机译：回复评论“旁观者的离子很重要！铜铝置换反应的动力学研究”
3. Spectator ions ARE important! A kinetic study of the copper-aluminum displacement reaction [J] . Sobel S.G., Cohen S. Journal of Chemical Education . 2010,第6期

机译：旁观者离子很重要！铜铝置换反应的动力学研究
4. Crystal growth from solution: microgravity gel or ground-based experiments? [C] . J.Karniewicz, Technical Univ. of Lodz, Lodz, Liquid and Solid State Crystals: Physics, Technology and Applications . 1993

机译：溶液中晶体的生长：微重力凝胶或基于地面的实验？
5. Beyond Agar: Gel Substrates with Improved Optical Clarity and Drug Efficiency and Reduced Autofluorescence for Microbial Growth Experiments [O] . Philipp A. Jaeger, Cameron McElfresh, Lily R. Wong, 2015

机译：超越琼脂：具有提高的光学清晰度和药物效率并减少了用于微生物生长实验的自发荧光的凝胶基质
6. Growth and study of barium oxalate single crystals in agar gel [O] . P. V. Dalal, K. B. Saraf 2006

机译：琼脂凝胶中草酸钡单晶的生长和研究

Experimenting with a Visible Copper-Aluminum Displacement Reaction in Agar Gel and Observing Copper Crystal Growth Patterns To Engage Student Interest and Inquiry

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