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Chinese Journal of Chemical Education  
  Chinese Journal of Chemical Education--2015, 36 (6)   Published: 18 March 2015
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Chinese Journal of Chemical Education. 2015, 36 (6): 0-0.
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Crystal Field and Magnetic Properties

LIU Ying, TAI Rui, LIU Yue
Chinese Journal of Chemical Education. 2015, 36 (6): 1-10. ;  doi: 10.13884/j.1003-3807hxjy.2014100091
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Crystal-field-induced magnetic anisotropy and necessary mathematical derivation are discussed in detail, including the relationship among crystal field, the annihilation of orbital magnetic moment and magnetic anisotropy, and the determination of crystal field parameters from magnetic property measurements and spectrum data.

Teaching Practice of Inquiry Learning in the Course of Green Chemistry in Normal Universities

LI Yu-Zhen, CAO Yong-Jun
Chinese Journal of Chemical Education. 2015, 36 (6): 11-15. ;  doi: 10.13884/j.1003-3807hxjy.2014080001
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In order to adapt well to the reform requirements of basic education of nowadays, and to cultivate excellent normal talents, it is very necessary and important to carry out the teaching practice of inquiry learning in normal universities. In this article, the feasibility, the process and the mode of inquiry learning in the course of green chemistry in Inner Mongolia normal university were discussed, and the teaching effects were evaluated and analyzed.

Systematic Discussion on the Stereoselectivity of Electrophilic Addition Reactions of Alkenes

Chinese Journal of Chemical Education. 2015, 36 (6): 16-19. ;  doi: 10.13884/j.1003-3807hxjy.2014070044
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Electrophilic addition is a typical reaction for alkenes which is important in undergraduate teaching and requires students to master skillfully. Several theories are involved in the reaction including reactive activity, regionselectivity, stereoselectivity and so on. However, in most textbooks, some of the discussions concerned with the stereoselectivity of electrophilic addition reactions of alkenes are not thorough enough to make the students understand,so that in this article, a systematic discussion was introduced, which would help students to comprehend this knowledge point.

Graphic Analysis of Chemical Reaction Enthalpy

HU Guang-Hui, PAN Zhan-Chang
Chinese Journal of Chemical Education. 2015, 36 (6): 20-22. ;  doi: 10.13884/j.1003-3807hxjy.2014060128
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The key and difficult points of physical chemistry may be the calculation of reaction enthalpy. Reaction enthalpy, formation enthalpy and combustion enthalpy often make the beginners confused in the calculation process. By designing energy level diagrams, including reaction enthalpy, formation enthalpy, combustion enthalpy and so on, it was discovered that those diagrams were helpful to simplify the calculation process and to clearly make a distinction about different enthalpies above-mentioned.

Reform of Experiment for Determining the Content of Bentonite in Drilling Fluid by Methylene Blue Method and its Effect

Chinese Journal of Chemical Education. 2015, 36 (6): 23-26. ;  doi: 10.13884/j.1003-3807hxjy.2014060077
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Aimed at the accuracy in determining the content of bentonite in drilling fluid by methylene blue method in the course of "basic experiments of oilfield chemistry", this experiment was improved by analyzing influence factors and optimizing conditions. Then the modified method was used in basic experiments teaching, open experiments and scientific research. Effects were gained in cultivating practical ability, innovative ability, spirit of seeking truth and engineering consciousness of undergraduates majored in petroleum engineering, assisting scientific research and directing site operation.

Catalytic Decomposition of Hydrogen Peroxide in Heterogeneous System

MA Yan, LIU Hui
Chinese Journal of Chemical Education. 2015, 36 (6): 27-30. ;  doi: 10.13884/j.1003-3807hxjy.2014070011
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A feasible comprehensive experiment was designed in this article to investigate the catalytic decomposition of hydrogen peroxide in a heterogeneous system using ferrihydrite as a catalyst. The activation energy, activation enthalpy and activation entropy of the decomposition reaction of hydrogen peroxide could be obtained through determining the rate constants at different temperatures, which makes students acquire some knowledge on the catalysis in heterogeneous system. In the experimental process, not only the experimental conditions can be selected by students, but also other iron oxides such as α-Fe2O3, α-FeOOH and γ-FeOOH are also used as catalysts to investigate the effect of crystal structure and crystallinity of iron oxides on their catalytic efficiency. The exploratory experiment design is favorable for students to develop their innovative ability, integrated experimental skill and scientific research ability.

Separation and Identification of Components of Unknown Wine Flavors

ZHOU Feng-Yan, ZHANG Wen-Zhi, LIU Li-Juan, YAN Peng, ZHAO Yu-Liang, ZHOU Li
Chinese Journal of Chemical Education. 2015, 36 (6): 31-35. ;  doi: 10.13884/j.1003-3807hxjy.2014070005
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Distillation, fractional distillation and infrared spectroscopy are basic experimental techniques of organic chemistry experiment. Meanwhile, structure determination of unknown materials is a logical reasoning process by comprehensive utilization of unknown materials' properties and scientific analysis. Students' abilities of integrated utilization of experimental techniques, scientific analysis of experimental results, reasonable structure determination of unknown materials can be cultivated by experimental techniques with examples of separation and identification of unknown components of wine flavors.

Practical Exploration on Design Experiment of Frequency Conversion and Energy Saving

ZHAO Ye-Jun, ZHANG Shu-Zhen
Chinese Journal of Chemical Education. 2015, 36 (6): 36-38. ;  doi: 10.13884/j.1003-3807hxjy.2014060170
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In chemical engineering principle experiment, fluid flow comprehensive experiment includes the determination of centrifugal pump characteristic curve, calibration of flowmeter, etc. The experiment of relation between flow rate and power frequency was developed by latest technology of frequency conversion to make up the deficiency of frequency conversion and energy saving in current textbook, which can improve students' active learning ability, cultivate students' engineering quality and develop their comprehensive competences.

Exploration on Teaching of Organic Chemistry Experiment in Local Undergraduate Colleges

WEI Fu-Hua, ZHANG Sheng-Jun
Chinese Journal of Chemical Education. 2015, 36 (6): 39-41. ;  doi: 10.13884/j.1003-3807hxjy.2014060143
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Problems presently existed in teaching methods, teaching contents and evaluation methods of organic chemistry experiment teaching in local undergraduate colleges were analyzed, and several teaching methods of organic chemistry experiment were explored according to local colleges' conditions and students' qualities.

Exploration of Teaching Method of Property and Preparation of Inorganic Compounds:Cultivation of Practical Ability and Creative Consciousness of Students in Basic Chemistry Experiment

ZHAO Yun-Ling, OUYANG Jin, SUN Hao-Ling, FAN Lou-Zhen, JIANG Fu-Bin
Chinese Journal of Chemical Education. 2015, 36 (6): 42-45. ;  doi: 10.13884/j.1003-3807hxjy.2014120138
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The traditional teaching method of basic chemistry experiment is changed. The new teaching method of property and preparation of inorganic compounds is explored in a way of scientific research. In experimental process, the practical ability and creative consciousness of the students are cultivated.

Reform of Evaluation System of Design Experiment in Chemistry Didactics Teaching Using the GRAPA Evaluation Method

LIU Cui, ZHUANG Qi-Ya, LI Shuang, DAI Wen-Jie
Chinese Journal of Chemical Education. 2015, 36 (6): 46-51. ;  doi: 10.13884/j.1003-3807hxjy.2013100017
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Based on the GRAPA evaluation method and the characteristics of design experiments, we set up teaching standards of design experiment in chemistry didactics, built evaluation scales for teachers and students, and carried out the practice research. The research results showed that the GRAPA evaluation method had both functions of formative and summative assessment, which could promote the communications and interactions between teachers and students, improve the students' learning interest, experimental innovation consciousness and self-monitoring ability.

Pre-service Chemistry Teachers' Ability of Experiment Teaching and its Formation Path

DU Zheng-Xiong
Chinese Journal of Chemical Education. 2015, 36 (6): 52-55. ;  doi: 10.13884/j.1003-3807hxjy.2014050072
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The experiment teaching ability is an important symbol of chemistry teachers' professional development. For pre-service chemistry teachers, explaining and thinking are important abilities in chemistry experiment teaching, and the exploring ability is the core. Experiment teaching ability can be achieved in processes of observation, practice and reflection. Experiment teaching, giving lectures, teaching competition, instructional probation and teaching practice are valid paths to form experiment teaching abilities for pre-service chemistry teachers.

Novel Experiment Teaching System and Case Analysis of Food Biochemistry in Higher Vocational Education

Chinese Journal of Chemical Education. 2015, 36 (6): 56-59. ;  doi: 10.13884/j.1003-3807hxjy.2014070027
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A novel experiment teaching system of food biochemistry including basic experiment, comprehensive experiment and design experiment was constructed. Some methods about how to deal with the relationship between theory and practice, this course and subsequent courses, inside and outside of class room, teaching and scientific research were introduced with analysis of tipical teaching cases.

Exploration and Practice on Chemistry Curriculum Reform of Pharmaceutical Engineering Specialty

LIU Feng-Zhi, YU Tian-Tao
Chinese Journal of Chemical Education. 2015, 36 (6): 60-62. ;  doi: 10.13884/j.1003-3807hxjy.2014030153
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Chemistry curriculum is required for students major in pharmaceutical engineering. In chemistry teaching,problems include overlap of some theoretical contents, isolation of different experimental courses, more contents with less teaching hours, laggard teaching mode and old evaluation system. Exploration and practice on chemistry curriculum reform of pharmaceutical engineering specialty in Linyi university was introduced in this article, including integrating and optimizing theoretical and experimental courses, setting chemical comprehensive experiments and innovative experiments, improving teaching methods and constructing creative classroom, promoting reform of examination and evaluation systems.

Problems and Reflection on Thesis Writing of Education Master

XU Yan-Hong
Chinese Journal of Chemical Education. 2015, 36 (6): 63-66. ;  doi: 10.13884/j.1003-3807hxjy.2014090081
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This article analyzed the problems of thesis writing of education master from aspects of research purpose, theoretical foundation, core contents, case analysis, and conclusion of research and so on, and gave some proposals.

Chiral Compounds without Chiral Carbon Atom and their Absolute Configuration with Case Analysis of Cambridge Structural Database System

Chinese Journal of Chemical Education. 2015, 36 (6): 67-70. ;  doi: 10.13884/j.1003-3807hxjy.2014080022
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With examples of Cambridge structural database system and related 3D visualization software, this article introduces the heteroatom chiral, axial chiral, planar chiral, helical chiral, supramolecular chiral compounds without chiral carbon atom and their absolute configuration to deepen understanding of concept of chirality.

Comparative Analysis of the Rule of Stoichiometric Number Ratio and the Rule of Equal Amount of Substance

ZHAO Jian-Hong, ZHANG Jia-Li, ZHAO Meng-Yue
Chinese Journal of Chemical Education. 2015, 36 (6): 71-75. ;  doi: 10.13884/j.1003-3807hxjy.2014070002
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The rule of stoichiometric number ratio is unfavorable to the implementation of SI stipulation about amount of substance, inconsistent with equivalent law, unable to indicate property of reaction and to express water hardness, alkalinity, resin exchange capacity and electrolysis law, and has more complex calculation. However, the rule of equal amount of substance can inherit and develop equivalent law and make the calculation of titration simple.

Determination of the Number of Components in a System

LIANG Shan, DENG Tian-Long, LI Hai-Ming, CUI Yu-Hong, ZHAO Yan
Chinese Journal of Chemical Education. 2015, 36 (6): 76-80. ;  doi: 10.13884/j.1003-3807hxjy.2014070075
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Physical quantities in the equation of components were demonstrated and examples were given to illustrate the calculation of the number of components. The effects of chemical equilibrium and complete reaction to components in a system were also discussed,including that chemical equilibrium would not affect the number of components if the products of a chemical equilibrium were same phase, and complete reactions could be treated as chemical equilibrium without consuming multiple reactants. Finally, the steps for determining the number of components of a system were summarized.

Chinese Journal of Chemical Education. 2015, 36 (6): 81-81.
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