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Chinese Journal of Chemical Education  
  Chinese Journal of Chemical Education--2015, 36 (16)   Published: 18 August 2015
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Chinese Journal of Chemical Education. 2015, 36 (16): 0-0.
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Harms, Recycling and Treatment Technology of VOC

ZHAO-Lin, ZHANG Ying-Feng, LI Rong-Huan, MA Zi-Chuan
Chinese Journal of Chemical Education. 2015, 36 (16): 1-6. ;  doi: 10.13884/j.1003-3807hxjy.2014100167
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This article introduced sources,types and harms of volatile organic compounds(VOCs), summarized recycling technologies of VOCs such as condensation, adsorption, membrane separation and treatment technologies of VOCs including combustion, low temperature plasma treatment, photocatalytic degradation, bio-degradation.

Driving Force of Spontaneous Reactions in Organisms

WANG Zhen-Chao, DONG Xue-Ling, JIANG Hao
Chinese Journal of Chemical Education. 2015, 36 (16): 7-10. ;  doi: 10.13884/j.1003-3807hxjy.2015010070
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Organisms obtain energy from outside in the form of free energy in order to drive life process and the whole process follows the laws of thermodynamics. The changes of free energy in chemical reactions can be added and chemical reactions in organisms can be coupled, which make thermodynamically unfavorable reactions in organisms can be promoted by thermodynamically favorable reactions. Adenosine triphosphate (ATP), as one of high-energy biological molecules, is direct energy source of life activities. It is these high-energy biological molecules that drive the chemical processes in living organisms. They transfer external energy to the energy of organisms to generate and maintain highly ordered structure in organisms.

Practice and Reflection on Inquiry Learning of Analytical Chemistry

SHENG Li, TAO Cai-Hong, LIU Gai-Lang
Chinese Journal of Chemical Education. 2015, 36 (16): 11-14. ;  doi: 10.13884/j.1003-3807hxjy.2014110012
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This paper introduced inquiry learning of analytical chemistry with example of titration analysis, focused on guiding students to select topics, demonstrate and make experiments, paid more attention to the process and method of inquiry, especially the evaluation of students' practical ability including students' attitude, inquiry methods and skills, innovative spirit and achievements.

Scientific Inquiry Teaching of Physical Chemistry with Example of Standard Heat of Formation and Standard Combustion Heat

YANG Xi-Ping, ZHANG Yu-Jun
Chinese Journal of Chemical Education. 2015, 36 (16): 15-17. ;  doi: 10.13884/j.1003-3807hxjy.2014110011
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This paper applied scientific inquiry teaching method to the teaching of standard heat of formation and standard combustion formation, involving setting teaching goals of scientific inquiry, discussing conclusions through data analysis and simulating the design of instruments.

Multiple Representations Teaching:Chemical Equilibrium during Card Game

REN Hong-Yan, YIN Xiao-Jie, ZHANG Ya
Chinese Journal of Chemical Education. 2015, 36 (16): 18-21. ;  doi: 10.13884/j.1003-3807hxjy.2014110055
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Based on multiple representation model, problem solving teaching can reduce the tension between theory and practice, avoid inherent alienation of science curriculum and teaching reform by interdisciplinary perspective. Card game activities were carried out during the teaching practice of chemical equilibrium. Results showed that the teaching activities could help students to understand symbolic representations deeply by micro representation, realize the transformation between different concepts, correct erroneous concepts, and construct profound ideas of chemical equilibrium.

Practice and Innovation in Chemistry Experiment Teaching Using Teaching Method of Quadruple Suspecting Quadruple Revisiting based on Double Loop Thinking

XING Guo-Wen, HE Yong, RAN Li-Nan
Chinese Journal of Chemical Education. 2015, 36 (16): 22-25. ;  doi: 10.13884/j.1003-3807hxjy.2015030147
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We proposed a novel teaching method of quadruple suspecting quadruple revisiting based on double loop thinking in university comprehensive chemistry experiment course. The practice and innovation using this teaching method on the course was deeply discussed. In addition, we demonstrated the application of the teaching method on a detailed comprehensive chemistry experiment, which is α-chymotrypsin catalyzed synthesis of N-protected leu-enkephalin tripeptide fragment in organic solvent.

Comprehensive Experiment of Synthesis of Ethyl Cinnamate Catalyzed by Gallium Sulfate/Attapulgite Solid Acid

LI En-Bo, JI Yong-Feng, MAO Wei-Xi
Chinese Journal of Chemical Education. 2015, 36 (16): 26-29. ;  doi: 10.13884/j.1003-3807hxjy.2014080128
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This article designed a comprehensive experiment of synthesis of ethyl cinnamate including preparation of cinnamic acid, preparation of gallium sulfate/attpulgite solid acid catalyst, synthesis of ethyl cinnamate and determination of esterification rate of ethyl cinnamate. As a result, the optimized reaction conditions of synthesis of ethyl cinnamate as follow: the mass of cinnamic acid was 7.5 g, the amount of ethanol was 18 mL, the mass of catalyst was 3.0 g, react at 120 ℃ in 3.0 h. The yield of ester was no less than 85%, and the yield of ester was 42.3% while the catalyst reused more than 7 times. The experiment has significant characteristics of comprehensive experiment.

Solvent-free Microwave-Irradiated Friedel-Crafts Acylation Catalyzed by Al2O3

DUAN Xin-Hong
Chinese Journal of Chemical Education. 2015, 36 (16): 30-32. ;  doi: 10.13884/j.1003-3807hxjy.2014100138
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This article proposed a safe, simple and rapid organic chemistry experiment, Friedel-Crafts 3-acylation of indole, to carry out green organic chemistry experiment teaching for undergraduates. This synthesis employing chromatographic-grade Al2O3 as an environment-friendly, inexpensive, reusable and effective catalyst to replace the traditional AlCl3, was carried out under solvent-free condition in a commercial microwave oven rather than using conventional heating in a hazardous solvent. The product could be easily isolated from Al2O3 and purified by recrystallization in ethanol. This experiment could allow students to experience the green organic synthesis and also help them to reinforce their knowledge of electrophilic substitution and heterocycle chemistry.

Improvements and Teaching Discussions of Thin-layer Chromatography Experiment

LI Heng, WU Ai-Bin, ZHOU Lai-Cheng, WANG Jiang-Xue, LIU Yu-Cheng, GONG Yin-Xiang
Chinese Journal of Chemical Education. 2015, 36 (16): 33-36. ;  doi: 10.13884/j.1003-3807hxjy.2014100061
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A mixture of N,N-dimethyl-4-(phenylazo)benzenenamine and trans azobenzene was selected as a test sample, which was expanded in single and mixed solvent with different ratio after being spotted on a TLC plate. The influences of sample polarity and solvent polarity on the separation effects of the thin-layer chromatography have been investigated. Acetanilide and benzamide were selected as test samples, which were developed under the ultraviolet lights and in iodine vapor after being expanded.Via examples above, students could master common chromogenic methods in the thin-layer chromatography experiments. A few problems in processes of experiments, such as selections of matter polarity and developing solvents, different chromogenic methods and separation effects were discussed on teaching methods.

Improvement of Experimental Device for Determining Catalytic Decomposition Rate of Hydrogen Peroxide

WU Yong-Cong, WU Si-Hao, XIE Ming-Li, PAN Zhan-Chang, HU Guang-Hui, SU Xiao-Hui
Chinese Journal of Chemical Education. 2015, 36 (16): 37-39. ;  doi: 10.13884/j.1003-3807hxjy.2014110024
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In the experiment of determining catalytic decomposition rate of hydrogen peroxide, gas pressure within the reaction vessel and the relationship of pressure change with time were measured by a barometer under conditions of constant volume. The improved device was not only more convenient in operation, but also more sensitive and accurate.

Teaching Reform of Instrumental Analysis Experiment for Applied Talents Training

LI Hui-Hui, ZHANG Shi-Wei, HAI Jin-Hui, YANG Xiao-Di
Chinese Journal of Chemical Education. 2015, 36 (16): 40-43. ;  doi: 10.13884/j.1003-3807hxjy.2014100162
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To achieve objectives of applied talents training, design experiments which could promote the cultivation of students' innovative and practical abilities were added in teaching system of instrumental analysis experiment. In this teaching reform, the author advocated reasonable selection of teaching contents, combining theory with practice, heuristic teaching, multimedia teaching means, and scientific and comprehensive assessment system. Not only the important role of design experiments in teaching of instrumental analysis, but also the scientific teaching program, the advanced teaching contents and the coherent teaching methods have been highlighted. Therefore, innovative and practical abilities of students could be promoted.

Practice-oriented Curriculum Construction of “Instructional Design of High School Chemistry” for Normal School Students

BI Hua-Lin, JIANG Yan-Xia, QI Ying
Chinese Journal of Chemical Education. 2015, 36 (16): 44-46. ;  doi: 10.13884/j.1003-3807hxjy.2015030113
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“Instructional design of high school chemistry” for normal school students are constructed in four dimensions respectively, that is curriculum content system, teaching model, teaching resources and teaching forms. The curriculum content system is in conformity to the idea which reflect “ theory-strategy-practice”. The teaching model are composed of three aspects that are theory learning, case demonstration and practices training. The ample teaching resources are developed in various of teaching case library. Last but not the least, the teaching forms are expend in the way of combination face-to-face with network curriculum.

Application of PBL in Organic Chemistry Teaching for Pharmacy Major in Higher Vocational Education

SHEN Yang-Fan, ZHANG Xun-Yun
Chinese Journal of Chemical Education. 2015, 36 (16): 47-49. ;  doi: 10.13884/j.1003-3807hxjy.2015010125
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PBL teaching method was employed in organic chemistry-teaching for pharmacy major in higher vocational education, and the teaching progress contained five steps including teachers' setting problems before class, literature search, group discussion, students' evaluation and teachers' summary. Compared with traditional teaching methods, PBL teaching method could arouse students' interest of learning, cultivate their independent learning ability and improve their ability to analyze and solve problems.

Application of Flipped Classroom Teaching Mode in Examination Guidance of Chemical Certificate

HUANG Zhao-Feng
Chinese Journal of Chemical Education. 2015, 36 (16): 50-53. ;  doi: 10.13884/j.1003-3807hxjy.2015010124
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The application of flipped classroom teaching mode in examination guidance of chemical certificate teaching mode showed that students' acceptance of flipped classroom was really high,videos provided by teachers were useful for learning before class,students could actively complete most of the learning tasks before class and easily adapt to learning activities during the class.Practice showed that in a relatively short time of teaching, students' adaptive capacity of the application of flipped classroom in skill operation teaching is stronger than that in theory teaching.

Case Teaching Method in Safety Management of Chemical Industry Course

ZHAO Liu-Ying, YANG Fan, YANG Rong
Chinese Journal of Chemical Education. 2015, 36 (16): 54-57. ;  doi: 10.13884/j.1003-3807hxjy.2014100039
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This paper discussed the necessity and feasibility of case teaching method in the course of safety management of chemical industry for engineering undergraduates in colleges and universities. This paper used specific cases to illustrate the teaching process, evaluated the implementing effect of case teaching method according to the results of the questionnaire, and proposed the improvement measures on inadequacies of this method.

Construction of Experiment Teaching System of Chemical Engineering Principle based on Cultivation of Innovative Talents

GUO Xiao-Ya, ZHANG Zhang, ZHOU Zhong-Hua
Chinese Journal of Chemical Education. 2015, 36 (16): 58-60. ;  doi: 10.13884/j.1003-3807hxjy.2014090119
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This paper introduced the reform and innovation of chemical engineering experiment course from three aspects including teaching module and experimental level, content of course, and teaching method and assessment. Experiments were divided into four levels such as demonstration type experiment, verification type experiment, comprehensive experiment, and research and development type experiment to inspire students' initiative in study, which could cultivate students' experimental skills and innovative consciousness, enhance their innovative ability.

Analysis of Textbook Implementation of Medical Chemistry

WANG Yi-Wei, LIU Yuan, ZHANG Yan-Jun, GUO Jian-Min
Chinese Journal of Chemical Education. 2015, 36 (16): 61-63. ;  doi: 10.13884/j.1003-3807hxjy.2014120002
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The textbook medical chemistry compiled and published by Chinese Peking Union Medical College had been used in nurse, clinical Chinese and Western medicine, and rehabilitation specialties in Luzhou medical college. The preparing lessons, implementation of teaching, teaching effects and existing problems were analyzed.

Application of Problem-based Teaching Mode in Materials Chemistry based on Network

CHEN Yu-Feng
Chinese Journal of Chemical Education. 2015, 36 (16): 64-67. ;  doi: 10.13884/j.1003-3807hxjy.2014090014
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Problem-based teaching mode based on network has been applied in materials chemistry teaching.In the new teaching mode, students learned autonomously and teachers gave supplementary guidance by means of network. In the specific process, teachers set questions; students consulted relevant documents, discussed according to the given questions, and then summed up the discussed results; in the end, teachers gave corresponding comments and guidance in view of the summarized results.Practical results indicated that the new teaching mode was in favor of cultivation of autonomous learning and abilities of problem solving for students, which was useful for establishing diversified teaching forms.

General Education of Chemistry: Simple Approach to Balancing Chemical Equations of Combustion of Hydrocarbons

Cheng Man Diana LAU, Pong Kau YUEN
Chinese Journal of Chemical Education. 2015, 36 (16): 68-70. ;  doi: 10.13884/j.1003-3807hxjy.2014100041
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In the teaching of general chemistry, the authors used balancing chemical equations of combustion of hydrocarbons as the theme, demonstrated the application of mathematical methods in balancing chemical equations, and adopted interdisciplinary approach to enable students from different backgrounds to think and learn from various perspectives to master the nature and application of mathematical methods in chemistry.

Methods for Distinguishing Configurations of Atom with Lone Pair Valence Electrons in Molecules

QIN Zhi-Qiang
Chinese Journal of Chemical Education. 2015, 36 (16): 71-75. ;  doi: 10.13884/j.1003-3807hxjy.2014080120
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Based on hybrid orbital theory, valence shell electron pair repulsion theory, delocalized π bond and examples, this article summed up methods of distinguishing different configurations of the same atom with lone pair valence electrons in molecules. Atom may have three kinds of hybridization such as sp1, sp2, sp3 when it has two or three pairs of lone electrons (e.g.F), if the central atom bonded to it is sp1, sp2, sp3 hybridization,the atom itself is also sp1, sp2, sp3 hybridization respectively, and corresponding examples are HC≡CF, H2C=CHF and CH3F. Atom with only one pair of lone electrons(e.g.N)can have two kinds of hybridization including sp2 and sp3; If the central atom bonded to it is sp1 or sp2 hybridization, the atom itself is sp2 hybridization, such as HC≡CNH2 and H2C=CHNH2; If the central atom bonded to it is sp3 hybridization, the atom itself is also sp3 hybridization, such as CH3NH2. This article also discussed the applying scope of the method and described the application of the method with examples.

Yu He-qin and “Hua” Nomenclature for Inorganic Compounds

WANG Xi-Rong
Chinese Journal of Chemical Education. 2015, 36 (16): 76-80. ;  doi: 10.13884/j.1003-3807hxjy.2015020066
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Yu He-qin, applied himself to the practice of sinicization of science, was a new-typed scholar in the late Qing Dynasty and Republic of China. This paper discussed Yu He-qin's papers such as Chemical Nomenclature, The list of Chinese Chemistry Terms, etc., analysed his introduction and sinicization of “Hua” nomenclature for inorganic compounds, and presented the academic influence of his“Hua” nomenclature.

Chinese Journal of Chemical Education. 2015, 36 (16): 81-81.
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