Cerium, as one of the rare earth elements, has the unique characteristics of 4f electron layer and lanthanide contraction of the rare earth elements. In addition, due to its 4f¹5d¹6s² electron configuration, cerium element has certain applications in dyeing agent, catalyst, polishing powder and magnetic materials. The properties, preparation and application of cerium and cerium compounds are introduced in this paper.

The curriculum construction, teaching practice and reform exploration on green chemistry as a general education public elective course for undergraduates of comprehensive universities were described in detail. The students' study interests was greatly inspired and the teaching effect was significantly improved through reforming the meticulousness of teaching emphases, the degree of difficulty of the curriculum, the diversification of teaching methods and the rationalization of evaluation mechanism. The total construction aim and implementation plans of green chemistry as a general education course for all majors were clarified, which would also probably provide some valuable teaching experience and reform approaches for the construction of other chemical general education courses.

In view of the problems in the current assessment method of inorganic chemistry curriculum in regional colleges and universities, this work constructs the student development-oriented and stereo assessment mode, which is student-centered, emphasizes process and stresses the educational assessment theory of student development. It is a proper compliment to the final result-based assessment. Practice of the proposed assessment mode increases average scores of inorganic chemistry I and Ⅱ by 12.17% and 13.92%, respectively, highly motivates students' learning interests, and promotes changes of teachers' teaching method and student's study motivation. It closely integrates reform of examination assessment and reform of classroom teaching and raises quality of talent cultivation.

This paper illustrates the application of mind mapping as a thinking tool in organic chemistry teaching from the five aspects of section summary, acidity and basicity, identification, preparation and synthesis of organic matter. The mind maps can systematize, methodize, and simplify the organic chemistry knowledge, which helps to improve the teaching effect.

The wave nature of electron is not explained in detail in current structural chemistry textbooks although the nature is an important one for the electrons in atoms and molecules. To reduce the learning difficulty of this concept in the teaching practice, we described the physical character of the wave nature of electron as that one cannot predict its future position when it moves in a microscopic system. Our teaching activity suggested that most students can understand the concept properly. Moreover, we found that the class discussions on the concept could help most students to understand that it is both the particle nature and the wave nature of electrons that collectively lead to the result of electron diffraction.

The advantages and disadvantages of the preparation of cyclohexanone by the sodium hypochlorite oxidation method and sodium dichromate oxidation method were compared in terms of environmental protection and product yield. Gas chromatography-mass spectrometry method was applied to the qualitative and quantitative analysis of cyclohexanone. The results showed that sodium hypochlorite oxidation method was superior to sodium dichromate oxidation in both environmental protection and product yield. It not only helped students to learn how to choose the best method when a kind of compound can be synthesized by multiple ways but also enabled the students to improve experimental ability as well as to have a certain understanding of the material analysis techniques and instruments.

The α-diimine palladium complex has been synthesized and investigated as precatalyst for ethylene gas-phase polymerization in the presence of tetrakis (3,5-bis (trifluoromethyl) phenyl) borate (NaBArF), and the mechanical properties of the obtained polymer sample was tested. This experiment covers four aspects of ligand synthesis, metal-based catalyst synthesis, polymer synthesis and its mechanical property test, and very interestingly, "gas to material" can be observed, which can stimulate students' interests in learning polymer science and also improve their experimental skills.

This paper introduced the experimental principles and operation steps of the determination of chlorion by silver measuring method, compared and analyzed the indicators, standard solution, titration conditions, considerations and scope of application. And this paper also discussed the correspondence between the experimental methods and operation steps.On the basis of experiment preparation, operation, phenomena, records and results, students could better understand the contents of the chemical experiments,master the study methods for inorganic & analytical chemistry experiment,as well as enhance their innovation ability and practical ability.

Ionic liquid 1-methyl-3-butylimidazole bromide[BMIM]Br was synthesized and purified under microwave-assisted. The yield and purity of the product were determined. The structure of the product was characterized by FTIR and ¹HNMR. Ultrasonic-assisted extraction desulfurization of FCC and hydrocracking diesel oil with[BMIM] Br as extractant was carried out and the desulfurization rate was determined. A number of open designing experiments have been set up to optimize the reaction conditions, test methods, desulfurization selectivity and so on. The experiment combines fine chemical and petrochemical specialties and is offered as a senior specialty experiment. For students, it plays an obvious role in promoting knowledge system to cross-border and omni-directional training of comprehensive experimental skills, cultivating ability to solve practical problems, innovative consciousness and scientific research ability formation. The experimental projects were designed with modularized method, according with the principles of green experiment.

By changing the observation method to visualize the experimental process and phenomena. Macro photography function was achieved by clamping macro lens on the rear camera of mobile phone, the reaction of sodium silicate solution and mung bean big metal salt in a test tube was captured by video, the video editing software "master" was used to set play times, and multimedia teaching showed the experiment phenomena. Results show that this method can capture the reaction process, get clear and enlarged pictures, and the experimental phenomena details are obvious.

In order to improve the quality of chemistry educational practice, the concept of online to offline chemistry educational practice mode was proposed. According to the actual situation of chemistry educational practice in Nanning Normal University, we explored the online to offline chemistry educational practice mode. Through the organic combination of online and offline chemistry educational practice, the basic teaching skills of normal students were strengthened, the professional knowledge and the standardization of professional skills were enhanced, the assessment of educational practice results was perfected, and the teaching practice ability and innovation ability of chemistry students were effectively improved. Furthermore, it could further the students' teaching practice standardization and stabilization in our school, and provide valuable reference for other professional educational practice.

Explorations and practice of information-based teaching of instrumental analysis and testing technology are now in progress in accordance with the features of vocational students. The information-based teaching includes the form of pre-class learning task assignment as well as students learning in flipped classroom, "teaching+learning+practice"-integrated classroom teaching, and after-school reviews. Additionally, analysis on the effect and remaining problems of information-based teaching has been carried out. Based on the reform of information-based teaching, instrumental analysis and testing technique courses have pushed the boundaries of traditional teaching both in time and space, ignited students' interest in learning, constructed a brand new "student-centered and teacher-leading" teaching model, improved the effect of classroom teaching. To some extent, it has contributed to boosting the reform of information-based teaching in vocational classes for the referential significance they've offered.

In order to improve the teaching quality of analytical chemistry in Higher Vocational Colleges in the post MOOC era, a hybrid teaching mode based on SPOC for analytical chemistry was proposed. Firstly, the characteristics of higher vocational students and the main problems in the teaching of analytical chemistry were analyzed. Then according to the construction process based on the mixed teaching mode of SPOC, the principles and ideas of curriculum analysis, holistic design, resource development, teaching process and assessment design were expounded. Finally, the mixed teaching environment and implementation process of analytical chemistry course based on flipped classroom were discussed.

In order to multi-dimensionally cultivate students' core competences such as practical and innovative ability, lifelong learning ability and information acquiring ability, taking specific experiments as examples, the application of structural thinking in biochemistry experiment teaching was explored. The practice of teaching proved that the use of structural thinking mode in biochemistry experiments can make the knowledge orderly, gradient and easily expressed, and make the operation of experiments routinely, at the same time, effectively mobilize the students learning initiative. As a result, it is an effective teaching mode to cultivate students' core competences in a multi-dimensional way.

In this work, a science popularization platform mainly for primary and middle school students has been built by utilizing the advantages of scientific research and talent resources in colleges. The platform relies on the "Technology Chemistry" Practice Teaching Demonstration Center of Shaanxi Province. The group for the platform is constituted mainly by graduate students, and supplemented by teachers. "ABC"popular science curriculum system was established with integrating knowledge learning, practice exploration and weapon characteristics. Various practical projects about fun chemistry and related disciplines have been established on the platform in order to promote public understanding of chemistry, and cultivate public scientific spirit and improve their scientific literacy. At the same time, the practical ability of graduate students has been improved, and their interest in popular science work has been stimulated. Moreover, this work has opened up a new way for the cultivation of graduate students.

In this paper, a simple method based on smart phone photogrammetry was proposed for the measurement of contact angle. A smart phone with an attached close-up lens was used to get the photograph of the liquid drops on the solid surface, then the obtain pictures were measured and the contact angles were calculated. This simple and cheap method could be used to investigate the influence factors of contact angle, such as the surfactant and the hydrophility of the solid surface. By using this method, contact angle related experiments can be introduced in physical chemistry experiments, fine chemical engineering experiments and other courses to improve students' understanding of the concept of contact angles.

Based on the theory of stage education, this paper summarized the links and differences between the contents of high school chemistry and university inorganic chemistry through the study of freshmen in the university, investigated the difficulties in inorganic chemistry, grasped the relationship between teaching and learning, and focused on student development, combined with the actual teaching situation to explore the effective educational connection between high school chemistry and university inorganic chemistry. Moreover, provided evidences and suggestions for the teaching of inorganic chemistry teachers in universities.