NotesFAQContact Us
Collection
Advanced
Search Tips
Showing all 7 results Save | Export
Determination of Al Content in Commercial Samples through Stoichiometry: A Simple Experiment for an Advanced High-School Chemistry Olympiad Preparatory Course
Peer reviewed Peer reviewed
Direct linkDirect link
de Lima, Kassio M. G.; da Silva, Amison R. L.; de Souza, Joao P. F.; das Neves, Luiz S.; Gasparotto, Luiz H. S. – Journal of Chemical Education, 2014
Stoichiometry has always been a puzzling subject. This may be partially due to the way it is introduced to students, with stoichiometric coefficients usually provided in the reaction. If the stoichiometric coefficients are not given, students find it very difficult to solve problems. This article describes a simple 4-h laboratory experiment for…
Descriptors: Science Instruction, Chemistry, Stoichiometry, Secondary School Science
Investigating the Effect of Complexity Factors in Stoichiometry Problems Using Logistic Regression and Eye Tracking
Peer reviewed Peer reviewed
Direct linkDirect link
Tang, Hui; Kirk, John; Pienta, Norbert J. – Journal of Chemical Education, 2014
This paper includes two experiments, one investigating complexity factors in stoichiometry word problems, and the other identifying students' problem-solving protocols by using eye-tracking technology. The word problems used in this study had five different complexity factors, which were randomly assigned by a Web-based tool that we developed. The…
Descriptors: Science Instruction, Science Experiments, Eye Movements, Stoichiometry
"JCE" Classroom Activity #111: Redox Reactions in Three Representations
Peer reviewed Peer reviewed
Direct linkDirect link
Nieves, Edgardo L. Ortiz; Barreto, Reizelie; Medina, Zuleika – Journal of Chemical Education, 2012
This activity introduces students to the concept of reduction-oxidation (redox) reactions. To help students obtain a thorough understanding of redox reactions, the concept is explored at three levels: macroscopic, submicroscopic, and symbolic. In this activity, students perform hands-on investigations of the three levels as they work at different…
Descriptors: Chemistry, Science Instruction, Secondary School Science, High Schools
Assessing the Development of Chemistry Students' Conceptual and Visual Understanding of Dimensional Analysis via Supplemental Use of Web-Based Software
Peer reviewed Peer reviewed
Direct linkDirect link
Ellis, Jennifer T. – Journal of Chemical Education, 2013
This study was designed to evaluate the effects of a proprietary software program on students' conceptual and visual understanding of dimensional analysis. The participants in the study were high school general chemistry students enrolled in two public schools with different demographics (School A and School B) in the Chattanooga, Tennessee,…
Descriptors: Science Instruction, Secondary School Science, High Schools, Chemistry
Silver Science.
Peer reviewed Peer reviewed
Sumrall, William J. – Science Teacher, 1991
Presents four stoichiometric problems and their solutions that use spot metal prices quoted from the newspaper to integrate economics and chemistry. (MDH)
Descriptors: Chemical Reactions, Chemistry, Computation, Cooperative Learning
Assessment of Expert-Novice Chemistry Problem Solving Using HyperCard: Early Findings.
Peer reviewed Peer reviewed
Kumar, David D. – Journal of Science Education and Technology, 1993
Results of a HyperCard method for assessing the performance of expert and novice high school chemistry students solving stoichiometric chemistry problems (balancing chemical equations) is reported. MANOVA results indicate significant difference between expert and novice students solving the five stoichiometric chemistry problems using…
Descriptors: Chemistry, Computer Assisted Instruction, Educational Research, High Schools
Stoichiometric Problem Solving in High School Chemistry.
PDF on ERIC Download full text
Schmidt, Hans-Jurgen – 1992
The purpose of this descriptive study was to create and test questions on stoichiometry with number ratios for quick mental calculations and to identify students' problem-solving strategies. The present study was a component of a more comprehensive investigation in which 7,441 German senior high school students were asked to work on 154 test items…
Descriptors: Chemistry, Cognitive Style, Computation, Concept Formation