Difficulty in retaining college students in STEM majors is one of the key contributors to the scarcity of STEM graduates and a short supply of STEM workers in the United States. Two factors that are closely related to retention and achievement are transition to college and sense of belonging and involvement. We conducted a case study to explore…

Background/Purpose: Green chemistry is a branch of science that aims to design chemical products and processes that reduce or eliminate the use and generation of hazardous substances, thereby protecting the environment and human health. This research aims to analyze the results of green chemistry through laboratory practical work (LPW) using…

Assessing scientific inquiry competence (SIC) is essential for fostering students' inquiry skills, and the effectiveness of such assessments largely depends on teachers' assessment knowledge. Grounded in a four-dimensional framework of science teacher assessment knowledge, this study developed and validated a scenario-based diagnostic instrument…

The rapid shift from face-to-face to remote instruction in 2020 has resulted in recalibration of lecture and laboratory pedagogy. This research analyzed the impact of remote learning on student motivation and sense of belonging in large enrollment chemistry courses. Student responses were parsed according to specific demographics including gender,…

It began in 1869, and today we have 118 elements listed in the Periodic table, thanks to Mendeleev's work. Carbon, hydrogen, oxygen, and nitrogen are elements presented in many organic compounds. Some of them can exhibit photophysical and photochemical properties. Herein, we proposed an easy to make an experiment in chemistry classes to connect…

A novel demonstration device for realizing the intuitive visual observation of the system's internal energy change is proposed. The device is safe, simple, and efficient, combining an infrared camera with a water bottle sprayer. With this setup, the changes of thermal images for air and helium during the compression and expansion processes were…

Nanoscience and technology research offer exciting avenues to modernize undergraduate-level General Chemistry curricula. In particular, spherical nucleic acid (SNA) nanoconjugates, which behave as "programmable atom equivalents" (PAEs) in the context of colloidal crystals, are one system that one can use to reinforce foundational…

Over the four decades, there has been sustained research activity in chemistry education. However, in terms of bodies of research, only a few different views were recorded. Thus, this study aimed to examine the trend bodies of research on chemistry education over the past 40 years (1980-2020) by using bibliometric analysis. Data based was…

Under most conditions, a liquid mixture does not have long-range structural order and may be considered to be a homogeneous collection of molecules in random motion. However, if a single-phase critical mixture of a partially miscible liquid--liquid system is subjected to a small temperature jump into the two-phase region, then structural coherence…

Water electrolysis is used to teach important and fundamental concepts in chemistry. In practical water electrolysis experiments, it is difficult to achieve the ideal 2:1 ratio of hydrogen to oxygen. This work demonstrates an experimental setup comprising multiple water electrolysis cells connected in series to simultaneously visualize the effects…

Atoms may repel or attract each other, but bound systems get virtually all of the attention in the classroom. To address the imbalance, instructors can explore the basis of repulsion in a few simple systems and highlight the important role played by the Pauli principle. A good example is the first triplet excited state of H[subscript 2] wherein…

As simple and ubiquitous redox-active organic molecules, quinones participate in diverse electron transfer processes in chemistry and biological systems for energy transformation and signal transduction. We introduce here a practical exercise to study the redox potentials of benzoquinone and its two derivatives by combining the electrochemistry…

Fabrication of molecular devices will meet the demands of the miniaturization of traditional electronic devices. Although microfabrication based on the complementary metal-oxide-semiconductor process can fabricate high-quality single-molecule devices, the cost is high, leading to a challenge to provide a hands-on experiment in the teaching…

The thermal equilibration of himic anhydride [IUPAC (2-"endo,"3-"endo")-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid anhydride] to (2-"exo,"3-"exo")-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid anhydride and subsequent recrystallization of the "exo"-product can be performed as a standard…

Response process validity evidence can provide researchers with insight into how and why participants interpret items on instruments such as tests and questionnaires. In chemistry education research literature and the social sciences more broadly, response process validity evidence has been used and reported in a variety of ways. This paper's…