As a portable, array-available and simple electrochemical device, bipolar electrochemistry is rapidly developing in recent years and has attracted much increasing attention among researchers on analysis and sensing, material preparation, and screening. This review introduced the characteristic of the bipolar electrochemistry and two main devices of bipolar electrode (BPE):open BPE and closed BPE. Furthermore, taking an open bipolar electrode as example, this paper represented the electrochemical mechanism of BPE. It mainly introduced the relationship between driving electrodes and BPE, and the distributions of potentials and currents in BPE system, which provided a brief theoretical basis for the researcher in bipolar electrochemistry. In addition, the paper listed some research process of the BPE system in analysis and sensing, material preparation and screening.

This paper introduced, the experiences and results about the physical chemistry course teaching reform in education principles, teaching methods, assessment methods, team construction, teaching materials and information construction with the background of the talents training plan and national science talent training base in Jilin University. All the results would be benefit for the basic course system teaching reform and construction in chemical basic courses.

Stimulating students' interests in learning is the key to improve classroom teaching effect. This paper tried to collect hieroglyphical molecules from chemical popular science website "The Molecule of the Month" and use them in the classroom teaching of organic chemistry and organic synthesis chemistry. Through the realistic, witty, humorous and artistic hieroglyphical molecules used in classroom teaching,the enthusiasm and initiative of the students could be mobilized. And it improved interests in classroom and the vividness of teaching contents. Furthermore, it improved teaching efficiency and level.

By listing the instances of physical chemistry teaching, this paper briefly analyzed how to utilize the task-driven teaching mode to change the traditional way of physical chemistry teaching.These examples included collecting the history of physical chemistry, gathering the latest literatures of physical chemistry, setting up exercise database of physical chemistry, designing interesting experiments of physical chemistry. Teaching practice indicated that the task-driven teaching method stimulated their interests and enthusiasm. This method can cultivate the students' critical spirit,and help students setting up the knowledge system of physical chemistry.

The development of quantum chemistry provides not only vivid teaching cases, but also specific and visual interpretation for chemical phenomena and concepts for chemistry teaching. Based on the core of "interaction between researching and teaching", the potential application of quantum chemistry calculation in college chemistry teaching was elaborated by providing the specific examples of quantum chemistry advanced achievement assisted teaching as well as theoretical teaching assisted by quantum chemistry software. This proposed educational mode by combining quantum chemistry calculation and chemistry teaching will play a crucial role in promoting the development of chemical course, the reform of chemistry teaching, and the cultivation of students' scientific research innovation ability.

Through comparing the learning objectives and instructional processes between flipped classroom and traditional classroom, this paper elaborated the instructional design and practice process of flipped classroom teaching of "primary cell", including forming basic concepts through autonomous learning based on micro video and learning sheet before class, internalizing important concepts by solving problems in class and understanding the value of primary cells through open questions after class. The results of the practice showed that the flipped classroom teaching of "primary cell" was valid and beneficial to promote the development of students, and was superior to the traditional instruction to some extent.

Safety education is the most important task in laboratory safety management and all students should have basic safety knowledge about lab operation and chemical properties of reagents before starting experiment, so the teachers arranged a seminar "lab safety and guideline of lab reagents" to all fresh undergraduate students at first semester. For motivating students' interests to learn knowledge about lab safety, the teachers designed the course based on different majors and lab management practical situation with various teaching methods. Timely classroom test was used to strengthen students' impression and make sure that the training has met original goal. As the most important part of the safety management of institutional construction, taking part in safety education/training is the prerequisite for all students. After training, students' safety sense have been notably improved and laid solid foundation for following lab safety management. And this also demonstrated our college's safety management principle:people-oriented and prevention first.

This paper demonstrated and discussed the use of synergistically combining traditional and half-open teaching modes in organic synthesis laboratory courses taking "synthesis of benzocaine" as an example. During the teaching process, the teacher not only conducted knowledge and skill based on traditional teaching modes but also used a half-open mode to inspire students' enthusiasm for learning and to train them in independent thinking. This new teaching mode displayed promising effects and a feasible approach to improve teaching outcomes.

In this experiment, apple was used as experimental materials and the tartaric acid of apple was extracted by water bath extraction and ultrasonic-assisted extraction. The extracting technical level was improved by orthogonal experiment. Moreover, acid-base titration was used to determine the total acidity. The results of the experiment showed that the extractive effect of water bath extraction was the best when the temperature was 80℃, the extracting time was 90 minutes, the mass of apple was 15 g, and the tartaric acid content was 4.476 3 g/kg correspondingly. About the ultrasonic-assisted extraction, the optimum extractive condition was that the temperature was 70℃, the time was 30 minutes, the mass of apple was 15 g, and the tartaric acid content was 4.791 8 g/kg.

An interesting physical chemistry experiment "adsorption of Prussian blue in wastewater by cotton stalk" was designed and implemented. Students could understand the surface phenomenon, influence factors of adsorption process, kinetics and thermodynamics of adsorption through this experiment. This experiment achieved remarkable teaching effectiveness, and cultivated students' innovative spirit and practical ability.

Taking "determination of lead in toys surface coating with atomic absorption spectrophotometry" as an example, this paper set up a teaching mode of "informatization, project teaching, student-centered" in order to optimize teaching contents and teaching activities including teaching analysis, teaching strategies, teaching organization and teaching effect. It was showed that the information-projects teaching mode could make the obscure fundamentals of courses easy to understand, motivate the initiative of students learning, and achieve enrichment of the traditional teaching methods and significant improvement of the teaching effect.

To explore the connection between chemistry course and modern medicine, this paper carried out chemical experiments to study the connection between incompatibility of medicines and the formulation of injecting drugs. By studying compatibility of vitamin C, iodine and trace elements injection and observing the phenomena of chemical reactions, students were facilitated to explore incompatibility between them. By comparing the syringe principle and the chemical principle of instruments and understanding the principle of injecting drug formulation or chemical solution preparation and dilution principle, students were promoted to transform their capability of chemical operations to that of medical operations.

A new smartphone imaging digital colorimetric method for determination of Cr(Ⅵ) in water was proposed. The Cr(Ⅵ) from aqueous solution reacts with diphenylcarbazide to form a color complex, then the digital images from the solution above was captured by a smartphone and imported into the Photoshop software to read the brightness value of green channels. The experimental data showed that brightness value is linearly correlated with the concentration of Cr(Ⅵ) in solution. The influential factors such as shooting mode and image reading mode were studied and optimized. The results were consistent with the spectrophotometric method with the recovery of 98.0%~102.0%. This obtained method is rapid, accurate, easy to operate and can be used in on-site analysis without professional instruments. The presented method of students' own smartphones as only testing equipment can greatly stimulate students' interests in experiment and innovative spirit.