by R. Sanjeev, P. Sreedhar and V. Jagannadham
Original Research
In the present work a simple and lucid method of calculation of percentage ionization or degree of ionization is explained.
World Journal of Chemical Education. 2021, 9(2), 64-67. DOI: 10.12691/wjce-9-2-5
Pub. Date: August 16, 2021
by Arijit Das
Original Research
In this approach, formulae-based mnemonics by using the classification of negative charge (localized or delocalized) have been highlighted by innovative and time economic way to enhance interest of students’ who belong to paranoia zone of chemistry for the prediction of hybridization state of carbon atom containing negative charge (one or more) and aromatic, anti-aromatic, non-aromatic behavior of different organic compounds. Here, I have tried to hub three (03) time economic mnemonics by including three (03) formulae for the prediction of hybridization state of carbon atom (containing negative charge), aromatic, anti-aromatic, and non-aromatic behavior of organic compounds. Educators can use these mnemonics in their teaching style in the classroom lectures after discussing conventional methods and its limitation to make chemistry intriguing. This article encourages students to solve multiple choice type questions (MCQs) on ‘Aromaticity of negative charge containing organic compounds’ at different competitive examinations in a time economic ground.
World Journal of Chemical Education. 2021, 9(2), 57-63. DOI: 10.12691/wjce-9-2-4
Pub. Date: June 18, 2021
3854 Views16 Downloads
by Jitendra M. Pawara and Sunil S. Patil
Original Research
In the present work, a series of new mixed ligand Ni(II) complexes of the type [Ni(P)(L).2H2O] have been synthesized by using 2-amino-6-methyl pyrimidine-4-ol (HP), a primary ligand and N- and O- donor amino acids (HL) secondary ligands. Synthesis of Ni(II) complexes has been carried out by thermal and microwave methods. Results show that complexes synthesized by the microwave method were more efficient than the thermal method. Preparation time in the microwave method was short (4-7 min.) as compared to the thermal method (45 min.). Additionally, the microwave technique gave a very high yield (90%) of the complexes. The prepared complexes were characterized by Gouy experiment, FTIR, elemental analysis, TGA, and DTA at room temperature. The complexes have shown considerable antimicrobial activities such as antifungal and antibacterial activity.
World Journal of Chemical Education. 2021, 9(2), 50-56. DOI: 10.12691/wjce-9-2-3
Pub. Date: May 15, 2021
2457 Views1 Downloads
by Kefa K. Onchoke and Emily E. Dowdy
Original Research
Introductory chemistry courses are normally designed for different students in colleges and universities. In many cases the Introductory Chemistry course is offered to students to satisfy a general science prerequisite and in other courses. At Stephen F. Austin State University, the Introductory Chemistry Course is taken by a majority of students who are declared nursing majors. This study examined the performance of student scores in five concepts in an Introductory Chemistry course. The data compares student performance for five randomly chosen concepts, namely; significant figures, reactivity of isotopes, half-lifes, electron configuration of ions, and equilibria. Standardized exams were used to assess and evaluate performance and trends of students (N = 841) in the five concepts for the academic years 2012 – 2018. Except for the “Equilibria” concept, many students showed performance that was greater than 55% or better. This study helps provide information that (i) can be used to improve areas where students may have poor understanding, (ii) is useful to instructors to decide on the time to spend in concepts in which students struggle. The reason(s) for the observed trends may stem from various factors, which include outside forces affecting students, or certain concepts may need more time for comprehension vis-à-vis others, and/or students not having strong previous foundations, especially in mathematical skills. The results of the study provide helpful information for instructors in science/education since these concepts may pose special challenges to different levels of difficulty. Overall, this study will help create a more successful classroom environment that is beneficial and enriches both the instructor and students.
World Journal of Chemical Education. 2021, 9(2), 46-49. DOI: 10.12691/wjce-9-2-2
Pub. Date: May 07, 2021
4373 Views18 Downloads
by Arijit Das
Original Research
IUPAC nomenclature of lower alkanes (1C to 10C) is quite common and digestible. But students face problems remembering and predict IUPAC word-root during IUPAC nomenclature of higher alkanes (C >11). Here in this innovative article, I have tried to focus IUPAC nomenclature of higher alkanes (11C to 90C) through the prediction of IUPAC word root by using innovative mnemonics to make the concept unambiguous, simpler, time economic, and interesting.
World Journal of Chemical Education. 2021, 9(2), 42-45. DOI: 10.12691/wjce-9-2-1
Pub. Date: March 30, 2021
4497 Views9 Downloads