The “scam” contains a wealth of chemical knowledge. Science popularization workers in colleges and universities can promote the knowledge of chemical science popularization in the process of deciphering these “scams”. This article attempts to establish a new idea of popularizing scientific knowledge of chemistry in the process of deciphering the “scams” by focusing on five problems of the 5W model: “Who will carry out science popularization”, “Who is the target of science popularization”, “How to carry out science popularization”, “What is the content of science popularization” and “What is the effect of science popularization”.The specific methods are as follows: Taking teenagers and the elderly as the key objects of science popularization, constructing a popular science popularization mode of “teachers+students”, paying equal attention to on-site demonstration and explanation, joint communication of new and old media, and evaluation of “effect index system”, so as to achieve the purpose of precision chemistry science popularization.

In order to control drug better, the relationship between chemistry and drugs is clarified and expounded systematically from the four aspects: why drugs are chemicals (the essence of drugs), drug testing and identification, the essence of drug addiction and the transformation of drugs from traditional to new type.

Metal-organic frameworks (MOFs) are introduced as the alternative of the complexes, [Cu(NH₃)₄]²⁺ and EDTA-Ca. The rigid structure of the ligands realizes the infinite and porous structure of MOFs. Multi-luminescence is discussed followed single emission. Then, the application of ratiometric fluorescence sensor and visual detection is proposed with multi-emission MOFs as examples. The abundant metal ions and organic ligands as well as the porous structure make MOFs attractive as multi-luminescence probes. Herein the electronic structure and luminescence of lanthanide metals are also mentioned. The ratiometric sensing and visible detection of the targets with MOFs as the probes, especially Ln-MOFs, are discussed. The combination of knowledge points and science frontiers promotes students to understand and master the knowledge. Moreover, the students' interest is stimulated in application of the knowledge to explore the unknown field.

General education courses were one of the important components to promote the general enrollment and specialty diversion under the new engineering background. In view of the drawbacks in the teaching process of general education courses in colleges and universities, the paper made overall planning and overall promotion from four aspects of course orientation, teaching method, resource allocation and evaluation system, to promote students' learning effect and the quality of talent cultivation to the greatest extent, thus providing certain reference value for the teaching reform of general education courses.

Based on the training objective of cultivating innovative talents in application-oriented universities, the Department of Chemistry and Chemical Engineering took the lead in carrying out scientific research training for undergraduates in Luliang University. Scientific research training was incorporated into the teaching process, the teaching reform has been carried out from the following aspects, including the curriculum system, teaching link, teaching means and assessment evaluation. The research teaching mode with scientific research training as the main line has been constructed.

In order to solve the practical problems in the teaching process of inorganic and analytical chemistry, and realize the objectives of moral education guidance, ability training and knowledge impartment, a new “five-in-one” blended teaching mode combined with online, offline, theory, practice, curriculum ideology and politics was constructed based on online and offline blended teaching, micro-lecture and flipped classroom,by focusing on the learning demand, ability and performance of students. Research on this teaching mode mainly covered four aspects, including teaching objectives, content, activities and effectiveness evaluation. After two consecutive semesters of educational practice, results showed that this teaching mode can significantly improve the enthusiasm and initiative of students and generate excellent teaching performance.

University chemistry as a general course plays an important role in training the scientific literacy in chemistry. According to the requirements of “New Engineering” and the characteristics of large-class teaching, the author proposes to a strategy named “role of identification” in teaching university chemistry. This method not only stimulates students to learn chemistry, but also builds positive teacher-student relationships for effective classroom management.

Based on the analysis of some problems existing in analytical chemistry course, this paper studies on the teaching reform of quality assurance and quality control in analytical chemistry under the background of “new subject”, and puts forward the suggestion that the “quality assurance and quality control in analytical chemistry” course or other similar coursesis essentialto students majoringin analytical chemistry. In order to adapt to the development of “new subject”, the teaching of analytical chemistrycourseshould focus on the entire process of analysis, and the theory content of quality assurance should be incorporated into the analysis.Problem identification and problem solvingabilities should be developed by the application of quality assurance and quality control, therefore, great attention must be paid to link theory with practice. In addition, the focus of analytical chemistry is “analysis”, which should maintain close contact with analytical laboratories/testing institutions. Apart from this, education-oriented activities towards marketing and technology should be established, so as to achieve education objectives and train analytical talents that keeping pace with the times.

This paper introduced the online teaching of analytic chemistry, which performed mainly on the network platforms of Chaoxing and Xuexitong, was well-designed base on the ideal of outcome-based education.The curricular implementation situations including the curriculum content and question bank, learning mode, student discussion after class, and learning effect detection, were presented in detail.The scores of online teaching practice and the satisfaction survey from students showed that the teaching quality and objectives are achieved. This paper could provide a reference for college teachers to carry out online teaching.

The surface tension data fitting methods of 13 substances such as acetic acid, propionic acid, n-butyric acid, 2-methyl butyric acid, 3-methyl butyric acid, valeric acid, hexanoic acid, ethanol, propyl alcohol, isopropyl alcohol, 1-butanol, 2-methyl-1-propanol, 1,2-propanediol at 25 ℃ were compared. The advantages and disadvantages of graphic method, polynomial approximation, first-order exponential function, power function and Shishkovsky formula were analyzed. It is pointed out that Shishkovsky formula is an ideal fitting method for surface tension data for its accurate fitting results with less affected by the sample size of data.

Though stating the design ideals, the contents and characteristics of test, analysis of competition result, the experimental theories test for the 11^th National Undergraduate Chemistry Laboratory Tournament has been discussed, analyzed and summarized. Moreover, some reform suggestions and problem thinking for the innovation in chemistry experiment teaching have been put forward in order to promote the reform and innovation of chemistry experiment teaching in colleges and universities.

Based on moso teach, open experiment teaching of physical chemistry was carried out by adopting flipped classroom teaching method. Relate information about design of the open experiment teaching system featured by multi-level teaching, including experimental content, as well as micro-courses and teaching procedures were introduced in detail. This teaching practice indicated that with these teaching methods, open experiment teaching was implemented successfully. At the same time, students' curiosity and enthusiasm was stimulated, and theutilization rateof laboratory resources also improved.

This paper mainly introduces a simple and practical U-tube osmotic device. The device consists of U-tube and base. The bottom of U-tube is detachable, the semipermeable membrane can be fixed with silicone gasket inside, and then connected by grinding port connection. The whole set of device is easy to operate, has obtained the national utility model patent, and is transformed into a product, which is expected to become a common device for osmotic experiment teaching.

This article aims to study the development of pre-service teachers' PCK before and after the chemistry teaching theory course. The data mainly comes from the teaching design and interviews of pre-service teachers, using PCK Map as analysis tools. The study found that after the course teaching, the number of recognizable PCK episodes actively displayed by the pre-service teachers in the instructional design has increased significantly.In addition, all the elements of the PCK of the pre-service teachers have been effectively developed, but the development is not balanced. The development of knowledge of instructional strategies for teaching science is the most well. The development of knowledge of science curriculum and knowledge of student's understanding in science is not perfect, and the development of orientation to teaching science and knowledge of assessment of science learning is relatively weak. In addition, the relationship between the PCK elements of normal students is basically established, but the stability and strength of the relationship are somewhat different.

Considering the teaching practice of higher vocational colleges, the main problems in experimental design, teaching content and teaching method of life chemistry experiment are analyzed systematically in the context of supply-front reform. Combined with carefully designed experiments, teaching methods based on experimental displaying, evaluation method showing students' professional characteristics, three specific practices are implemented.It embodies the scientificity, practicability, interesting and maneuverability of the course, and helps to improve the students' scientific literacy in higher vocational colleges.

This paper introduces a case of elementary chemistry teaching for freshmen of non chemistry majors by combining four teaching strategies (context-based teaching, inquiry-based learning, cooperative learning, blended learning). With garbage classification as the theme, students collaborated in groups to complete discovery learning tasks, investigated the chemical elements and their uses in different kinds of garbage, and disseminated the conclusions through three activities: offline classroom display, online achievement sharing and promoting chemical knowledge outside school. Compared with the data collected before and after the activity, 75% of the students only knew the chemical elements in the top 20 of atomic number before the task. After the activity, the number of elements learned by the students increased significantly, the average value was 1.7 times of the original. The confusion of Chinese name and chemical symbol was improved. Finally, a questionnaire showed that the activity had increased the students' enthusiasm in class and helped them understand the chemical elements in life.

In order to promote the connection between the experiment of identification of organic compounds and medical majors, as well as to improve the operation safety and reduce the toxicity and irritation of chemical reagents, this article selects a serial of reagents which are closely connected to medical science as candidates. Furthermore, methods which are green, safe, harmfulless, effective, easy to handle and cheap to identify candidates are provided to guide students in the design of experimental plan. It is expected to improve students' positivity and initiative, and promote their ability to analyst and solve problems, as well as to give referential value for further improvement of teaching in related field.

An open experiment focusing on the programming of molecular information is introduced in this article. In the experiment, the students need to complete a series of molecular programming tasks involving molecule input, output, analysis and modification. The data structure and algorithm knowledge learned from the students' programming courses are also utilized and practiced in those tasks. After the experiment, the participators are able to grasp the basic principles and methods to represent molecular structures in computer, and generate stronger interest in cheminformatics.

In order to investigate the real effect of chemical laboratory education, a questionaire survey was conducted to explore the laboratory anxiety, safety attitude, safety intention and safety knowledge of undergraduates in Grade 2 in the College of Chemistry and Chemical Engineering, Tianjin University of Technology. The results showed that the difference of laboratory anxiety occurred in gender, and females were more anxious than males. Undergraduates who have participated in safety training had more correct attitude towards safety than those who have not. The regression analysis demonstrated that the safety intention was positively correlated with laboratory anxiety, safety attitude and knowledge. Based on the results above, some improvement suggestion were proposed. The undergraduates' psychological security should be focused on and laboratory anxiety should be overcome by emotional counseling. The safety education patterns should be optimized to give full play of students' subjective initiative in the future. Finally, the safety education is also a process of morality education. Through safety education, undergraduates will be cultivated to revere life, responsibility and rules and become qualified practitioners.

It can be seen from the history of VSEPR model that the hypothesis of “The Cubical Atom” proposed by Lewis in 1916 laid the foundation for the formation of VSEPR model. In 1940, Sidgwick and Powell's hypothesis further promoted the formation of the VSEPR model. In 1957, Gillespie and Nyholm expanded the hypothesis of Sidgwick and Powell, and formally put forward the concept of Valence Shell Electron Pair Repulsion theory in 1963. To 1988, Gillespie proposed the ligand close packing model (LCP model) to make up for the shortcomings of the VSEPR model. The theory of Valence Shell Electron Pair Repulsion is a kind theory for qualitative study of molecular structure, which opens up the process of qualitative study of molecular structure by chemists.