Results 1 to 10 of about 368,451 (291)
2,2,3,3,4,4,4-Heptafluorobutyl Acetate—Chemical Equilibrium and Kinetics of the Esterification Reaction of 2,2,3,3,4,4,4-Heptafluorobutan-1-ol and Acetic Acid in the Presence of an Acidic Catalyst [PDF]
MoleculesThe kinetics and chemical equilibrium of the esterification reaction of acetic acid (AAc) and 2,2,3,3,4,4,4-heptafluorobutan-1-ol (HFBol) (using sulfuric acid as a catalyst) are determined experimentally.
Andrei V. Polkovnichenko +5 more
doaj +2 more sources
Science Education International, 2023 The goal of this study was to assess students’ level of conceptual understanding of chemical kinetics and equilibrium using topic-specific pedagogical content knowledge (TSPCK)-based instruction in chemistry grade 11 students.
Kassahun Dejene , Woldie Belachew
doaj +1 more source
Calculation of complex chemical equilibrium compositions of composite rocket propellants combustion products [PDF]
Journal of the Serbian Chemical Society, 2000 An adequate method for calculating chemical equilibrium in a predominantly gaseous, multi-component reactive mixture was investigated and successfully applied.
Filipović Miloš, Kilibarda Nikola
doaj +3 more sources
Ion-Induced Synthesis of Alginate Fibroid Hydrogel for Heavy Metal Ions Removal
Frontiers in Chemistry, 2020 Design and synthesis of environmentally friendly adsorbents with high adsorption capacities are urgently needed to control pollution of water resources. In this work, a calcium ion-induced approach was used to synthesize sodium alginate fibroid hydrogel (
Chuncai Kong +5 more
doaj +1 more source
Journal of Educational Chemistry, 2021 The purpose of this research is to produce virtual laboratory media to support laboratory-based learning with the features mentioned above to make students become scientists with comprehensive understanding competencies and laboratory engineering skills.
Deni Ainur Rokhim, Maya Oki Septiani
doaj +1 more source
Analysis of the chemical equilibrium of combustion at constant volume [PDF]
INCAS Bulletin, 2014 Determining the composition of a mixture of combustion gases at a given temperature is based on chemical equilibrium, when the equilibrium constants are calculated on the assumption of constant pressure and temperature.
Marius BREBENEL
doaj +1 more source
Estimation of Concentrations in Chemical Systems at Equilibrium Using Geometric Programming [PDF]
Journal of Chemical and Petroleum Engineering, 2017 Geometric programming is a mathematical technique, which has been developed for nonlinear optimization problems. This technique is based on the dual program with linear constraints.
Saeedeh Ketabi +2 more
doaj +1 more source
Molecules, 2020 Organosulfur compounds are widely used for the manufacture of drugs and materials, and their synthesis in general conventionally employs nucleophilic substitution reactions of thiolate anions formed from thiols and bases.
Mieko Arisawa, Masahiko Yamaguchi
doaj +1 more source
Educación Química, 2021 This study has been carried out aimed to compare the effectiveness of EMBE-R (Engage, Modification, building concept, Evaluation-Reflection) and verification strategies in preventing misconceptions in Chemical Equilibrium (CE).
jusniar - jusniar +3 more
doaj +1 more source
Mimbar Sekolah Dasar, 2022 This study aims to examine the effects of argumentation-supported problem-based learning (AS-PBL) carried out in the Chemistry-II laboratory course on the conceptual understanding of prospective science teachers about "Chemical equilibrium and Le ...
Hatice Güngör Seyhan +1 more
doaj +1 more source