| Journal Articles: 54 results |
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Netorials Rebecca Ottosen, John Todd, Rachel Bain, Mike Miller, Liana Lamont, Mithra Biekmohamadi, and David B. Shaw
Netorials is a collection of about 30 online tutorials on general chemistry topics designed as a supplement for high school or college introductory courses. Each Netorial contains several pages of interactive instruction that includes animated mouse-overs, questions for students to answer, and manipulable molecular structures.
Ottosen, Rebecca; Todd, John; Bain, Rachel; Miller, Mike; Lamont. Liana; Biekmohamadi, Mithra; Shaw, David B. J. Chem. Educ. 2008, 85, 463.
Acids / Bases |
Electrochemistry |
Reactions |
VSEPR Theory |
Stoichiometry
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A Laboratory Experiment Using Molecular Models for an Introductory Chemistry Class Shahrokh Ghaffari
Presents a new approach to using molecular models in teaching general chemistry concepts. Students construct molecular models and use them to balance simple chemical equations, demonstrate the law of conservation of mass, and discover the relationship between the mole and molecules and atoms.
Ghaffari, Shahrokh. J. Chem. Educ. 2006, 83, 1182.
Molecular Modeling |
Stoichiometry |
Student-Centered Learning
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Interactive Demonstrations for Mole Ratios and Limiting Reagents Crystal Wood and Bryan Breyfogle
The objective of this study was to develop interactive lecture demonstrations based on conceptual-change learning theory. Experimental instruction was designed for an introductory chemistry course for nonmajors to address misconceptions related to mole ratios and limiting reagents
Wood, Crystal; Breyfogle, Bryan. J. Chem. Educ. 2006, 83, 741.
Learning Theories |
Reactions |
Stoichiometry |
Student-Centered Learning
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Assessing the Effect of Web-Based Learning Tools on Student Understanding of Stoichiometry Using Knowledge Space Theory Ramesh D. Arasasingham, Mare Taagepera, Frank Potter, Ingrid Martorell, and Stacy Lonjers
This paper reports a comparative study using knowledge space theory (KST) to assess the impact of a Web-based instructional software program on students' understanding of the concept of stoichiometry. The software program called Mastering Chemistry Web (MCWeb) allows students to practice problems that emphasize the development of molecular-level conceptualization and visualization, analytical reasoning, and proportional reasoning, as well as learning to recognize and relate different representations in chemistry. The experimental design compared students in two sections taught by the same instructor. One section used the MCWeb instructional software as homework (MCWeb group) while the other section used text-based homework (non-MCWeb group, control).
Arasasingham, Ramesh D.; Taagepera, Mare; Potter, Frank; Martorell, Ingrid; Lonjers, Stacy. J. Chem. Educ. 2005, 82, 1251.
Stoichiometry |
Student-Centered Learning
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Evaluating Students' Conceptual Understanding of Balanced Equations and Stoichiometric Ratios Using a Particulate Drawing Michael J. Sanger
A total of 156 students were asked to provide free-response balanced chemical equations for a classic multiple-choice particulate-drawing question first used by Nurrenbern and Pickering. The balanced equations and the number of students providing each equation are reported in this study. The most common student errors included a confusion between the concepts of subscripts and coefficients and including unreacted chemical species in the equation.
Sanger, Michael J. J. Chem. Educ. 2005, 82, 131.
Stoichiometry |
Kinetic-Molecular Theory
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Using Knowledge Space Theory To Assess Student Understanding of Stoichiometry Ramesh D. Arasasingham, Mare Taagepera, Frank Potter, and Stacy Lonjers
Using the concept of stoichiometry we examined the ability of beginning college chemistry students to make connections among the molecular, symbolic, and graphical representations of chemical phenomena, as well as to conceptualize, visualize, and solve numerical problems. Students took a test designed to follow conceptual development; we then analyzed student responses and the connectivities of their responses, or the cognitive organization of the material or thinking patterns, applying knowledge space theory (KST). The results reveal that the students' logical frameworks of conceptual understanding were very weak and lacked an integrated understanding of some of the fundamental aspects of chemical reactivity.
Arasasingham, Ramesh D.; Taagepera, Mare; Potter, Frank; Lonjers, Stacy. J. Chem. Educ. 2004, 81, 1517.
Learning Theories |
Stoichiometry |
Constructivism
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Use of Chloroisocyanuarates for Disinfection of Water: Application of Miscellaneous General Chemistry Topics Gabriel Pinto and Brian Rohrig
Using the chlorination of water (using sodium dichloroisocyanurate and trichloroisocyanuric acid) to develop general chemistry concepts; includes question for students and answers.
Pinto, Gabriel; Rohrig, Brian. J. Chem. Educ. 2003, 80, 41.
Stoichiometry |
Water / Water Chemistry |
Applications of Chemistry |
Photochemistry
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Alka-Seltzer Fizzing—Determination of Percent by Mass of NaHCO3 in Alka-Seltzer Tablets. An Undergraduate General Chemistry Experiment Yueh-Huey Chen and Jing-Fun Yaung
Lab activity that introduces the concept of a limiting reactant by incrementally increasing the amount of vinegar added to an Alka Seltzer tablet.
Chen, Yueh-Huey; Yaung, Jing-Fun. J. Chem. Educ. 2002, 79, 848.
Acids / Bases |
Quantitative Analysis |
Stoichiometry
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Amounts Tables as a Diagnostic Tool for Flawed Stoichiometric Reasoning John Olmsted III
Amounts tables can be used to organize the data and reasoning involved in limiting-reagent problems. In this context, amounts tables can provide useful diagnostic information about students' abilities to reason stoichiometrically.
Olmsted, John A., III. J. Chem. Educ. 1999, 76, 52.
Learning Theories |
Stoichiometry
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News from Online: Using the Web for Your Courses Carolyn Sweeney Judd
Useful online resources for chemistry and education.
Judd, Carolyn Sweeney. J. Chem. Educ. 1998, 75, 1073.
Stoichiometry
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A Closer Look at the Addition of Equations and Reactions Damon Diemente
Chemists occasionally find it convenient or even necessary to express an overall reaction as the sum of two or more component reactions. A close examination, however, reveals that the resemblance between chemical algebraic equations is entirely superficial, and that the real meaning of addition in chemical equations is subtle and varies from case to case. In high-school courses, students are likely to encounter the addition of equations in thermochemistry, in electrochemistry, and in kinetics.
Diemente, Damon. J. Chem. Educ. 1998, 75, 319.
Calorimetry / Thermochemistry |
Electrochemistry |
Mechanisms of Reactions |
Stoichiometry |
Reactions
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Redox Balancing without Puzzling Marten J. ten Hoor
Once it has been established by experiment that the given reactants can indeed be converted into the given products, chemistry has done its job. Balancing the equation of the reaction is a matter of mathematics only.
ten Hoor, Marten J. J. Chem. Educ. 1997, 74, 1367.
Stoichiometry |
Oxidation / Reduction
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A New and General Method for Balancing Chemical Equations by Inspections Chunshi Guo
Any chemical equation, no matter how complicated, can be balanced by inspection. In fact, inspection is often the quickest and easiest way to balance complex equation. The method described here involves the use of "linked sets". It does not require the use of oxidation numbers of the splitting of equations into "half reactions". It can be used to balance all kinds of chemical equations, including ionic equations.
Guo, Chunshi. J. Chem. Educ. 1997, 74, 1365.
Stoichiometry
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Balancing Chemical Equations by Inspection Zoltán Tóth
The paper shows that the balancing chemical equations by inspection is not a trial-and-error process, because a systematic procedure for the balancing simple and more complicated chemical equations without oxidation numbers or equations with several unknowns can be suggested. The proposed method is suitable for balancing all the chemical equations, including ionic equations, which have single unique solution.
Toth, Zoltan. J. Chem. Educ. 1997, 74, 1363.
Stoichiometry
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On Balancing Chemical Equations: Past and Present William C. Herndon
The main purposes of this paper are to give a listing of selected papers on balancing chemical equations that may be useful to chemistry teachers and potential authors as background material, and to provide some comparisons of methods. The selection criteria for the references were deliberately broad, in order to include a wide variety of topics and seminal historical citations, and the references are annotated to increase their usefulness.
Herndon, William C. J. Chem. Educ. 1997, 74, 1359.
Stoichiometry
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Letter to the Editor about Letter to the Editor "Redox Challenges" from David M. Hart and Response from Roland Stout (J. Chem. Educ. 1996, 73, A226-7) Andrzej Sobkowiak
Examples of a variety of redox equations.
Sobkowiak, Andrzej. J. Chem. Educ. 1997, 74, 1256.
Stoichiometry |
Reactions |
Oxidation / Reduction
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Letter to the Editor about "Redox Challenges" by Roland Stout (J. Chem. Educ. 1995, 72, 1125) Rodger S. Nelson
Solution for balancing a difficult equation using the conservation of mass.
Nelson, Rodger S. J. Chem. Educ. 1997, 74, 1256.
Stoichiometry
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Stoogiometry: A Cognitive Approach to Teaching Stoichiometry Carla R. Krieger
Moe's Mall is a locational device designed to be used by learners as a simple algorithm for solving mole-based exercises efficiently and accurately. The mall functions as a map for setting up solutions to mole-based exercises using dimensional analysis. It clears the cognitive decks of students' easily overburdened short-term memory space, allowing them to focus on the versatility of the mole, rather than stepwise solutions to meaningless exercises.
Krieger, Carla R. J. Chem. Educ. 1997, 74, 306.
Learning Theories |
Computational Chemistry |
Stoichiometry
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Redox Challenges (the author replies) Stout, Roland
Algebraic solution to balancing a redox equation.
Stout, Roland J. Chem. Educ. 1996, 73, A227.
Stoichiometry |
Oxidation / Reduction |
Oxidation State
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Redox Challenges (2) Zaugg, Noel S.
Algebraic solution to balancing a redox equation.
Zaugg, Noel S. J. Chem. Educ. 1996, 73, A226.
Stoichiometry |
Oxidation / Reduction |
Oxidation State
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Redox Challenges (1) Hart, David M.
Algebraic solution to balancing a redox equation.
Hart, David M. J. Chem. Educ. 1996, 73, A226.
Stoichiometry |
Oxidation / Reduction |
Oxidation State
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The Relationship between the Number of Elements and the Number of Independent Equations of Elemental Balance in Inorganic Chemical Equations R. Subramanian, N.K. Goh, and L. S. Chia
The criterion for determining whether a chemical equation can be balanced fully by the algebraic technique and its application.
Subramaniam, R.; Goh, N. K.; Chia, L. S. J. Chem. Educ. 1995, 72, 894.
Stoichiometry |
Chemometrics
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Balancing a chemical equation: What does it mean? Filgueiras, Carlos A
Students were puzzled by the idea that one chemical equation could be balanced in several different ways. This led to a fruitful discussion on how exact a science chemistry really is.
Filgueiras, Carlos A J. Chem. Educ. 1992, 69, 276.
Stoichiometry |
Oxidation / Reduction
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Chemical equations are actually matrix equations Alberty, Robert A.
Chemists tend to think that chemical equations are unique to chemistry and they are not used to thinking of chemical equations as the mathematical equations they in fact are. The objective of this paper is to illustrate the mathematical significance of chemical equations.
Alberty, Robert A. J. Chem. Educ. 1991, 68, 984.
Stoichiometry |
Chemometrics
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Problem solving and requisite knowledge of chemistry Lythcott, Jean
It is possible for students to produce right answers to chemistry problems without really understanding much of the chemistry involved.
Lythcott, Jean J. Chem. Educ. 1990, 67, 248.
Stoichiometry |
Learning Theories
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Stoichiometry for copper dissolution in nitric acid: A comment Carr, James D.
An explanation for the reason that several sets of coefficients will balance the reaction equation between copper and nitric acid.
Carr, James D. J. Chem. Educ. 1990, 67, 183.
Stoichiometry
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A question of basic chemical literacy? Missen, Ronald W.; Smith, William R.
The ability to read and write clearly in chemical-equation terms is not as well developed as it should be. The purpose of this "Provocative Opinion" is to draw attention to this problem, and to suggest specific remedies for its solution.
Missen, Ronald W.; Smith, William R. J. Chem. Educ. 1989, 66, 217.
Stoichiometry
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Chemistry according to ROF (Fee, Richard) Radcliffe, George; Mackenzie, Norma N.
Two reviews on a software package that consists of 68 programs on 17 disks plus an administrative disk geared toward acquainting students with fundamental chemistry content. For instance, acids and bases, significant figures, electron configuration, chemical structures, bonding, phases, and more.
Radcliffe, George; Mackenzie, Norma N. J. Chem. Educ. 1988, 65, A239.
Chemometrics |
Atomic Properties / Structure |
Equilibrium |
Periodicity / Periodic Table |
Periodicity / Periodic Table |
Stoichiometry |
Physical Properties |
Acids / Bases |
Covalent Bonding
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A new method to balance chemical equations Garcia, Arcesio
A simple method, applicable to any kind of reaction, that does not require the knowledge of oxidation numbers.
Garcia, Arcesio J. Chem. Educ. 1987, 64, 247.
Stoichiometry |
Oxidation State |
Reactions
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Chemistry: Stoichiometry and Chemistry: Acids and Bases ( Frazin, J. and partners) Bendall, Victor I.; Roe, Robert, Jr.
Two reviews of a software package that contains drill and practice programs that are suitable for beginning students of chemistry.
Bendall, Victor I.; Roe, Robert, Jr. J. Chem. Educ. 1986, 63, A204.
Stoichiometry |
Acids / Bases
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S'mores: A demonstration of stoichiometric relationships Cain, Linda
S'mores are a good analogy for students struggling to learn stoichiometry.
Cain, Linda J. Chem. Educ. 1986, 63, 1048.
Stoichiometry
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Teaching stoichiometry Steiner, Richard P.
This author targets some of the reasons behind why it is so difficult for beginning chemistry students to understand stoichiometry. He reveals that if taught correctly and effectively, a 7-year old can grasp the concepts of stoichiometry.
Steiner, Richard P. J. Chem. Educ. 1986, 63, 1048.
Stoichiometry
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Balancing chemical equations with a Commodore 64 Loercher, William
67. Bits and pieces, 27. Too many students seem never fully develop the skill of balancing equations. This program helps facilitate development.
Loercher, William J. Chem. Educ. 1986, 63, 74.
Stoichiometry
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Mathematics in the chemistry classroom. Part 2. Elementary entities play their part Dierks, Werner; Weninger, Johann; Herron, J. Dudley
One of the problems that learners have to overcome when doing stoichiometry calculations is to learn how statements about elementary entities given by formulas and equations are related to statements about portions of substances as measured in the macroscopic world.
Dierks, Werner; Weninger, Johann; Herron, J. Dudley J. Chem. Educ. 1985, 62, 1021.
Chemometrics |
Stoichiometry
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How should equation balancing be taught? Porter, Spencer K.
Suggestions for balancing chemical equations.
Porter, Spencer K. J. Chem. Educ. 1985, 62, 507.
Stoichiometry
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Balancing complex chemical equations using a hand-held calculator Alberty, Robert A.
37. Bits and pieces, 14. This article is primarily concerned the question: If certain specified chemical species are involved in a reaction, what are the stoichiometric coefficients?
Alberty, Robert A. J. Chem. Educ. 1983, 60, 102.
Stoichiometry
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Investigation of secondary school students' understanding of the mole concept in Italy Cervellati, R.; Montuschi, A.; Perugini, D.; Grimellini-Tomasini, N.; Balandi, B. Pecori
Results of a small-scale investigation to ascertain the knowledge of chemistry among students entering first-year university courses in science.
Cervellati, R.; Montuschi, A.; Perugini, D.; Grimellini-Tomasini, N.; Balandi, B. Pecori J. Chem. Educ. 1982, 59, 852.
Stoichiometry
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Chemical equation balancing: A general method which is quick, simple, and has unexpected applications Blakley, G. R.
Using matrices to solve mathematical equations and balance chemical equations. From "The Goals of General Chemistry - A Symposium."
Blakley, G. R. J. Chem. Educ. 1982, 59, 728.
Stoichiometry |
Chemometrics
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Balancing chemical equations with a calculator Kennedy, John H.
A straightforward mechanical approach that leads quickly to a properly balanced equation.
Kennedy, John H. J. Chem. Educ. 1982, 59, 523.
Stoichiometry
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Chemical wastes and the law of conservation of matter Hill, John W.
This note discusses the conservation of matter as a starting point for understanding the problems of chemical waste.
Hill, John W. J. Chem. Educ. 1981, 58, 996.
Stoichiometry |
Toxicology
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More on balancing redox equations Kolb, Doris
Balancing atypical redox equations.
Kolb, Doris J. Chem. Educ. 1979, 56, 181.
Stoichiometry |
Oxidation / Reduction
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The chemical equation. Part I: Simple reactions Kolb, Doris
A chemical equation is often misunderstood by students as an "equation" that is used in chemistry. However, a more accurate description is that it is a concise statement describing a chemical reaction expressed in chemical symbolism.
Kolb, Doris J. Chem. Educ. 1978, 55, 184.
Stoichiometry |
Chemometrics |
Nomenclature / Units / Symbols |
Reactions
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A computer program designed to balance inorganic chemical equations Rosen, Allen I.
A BASIC program designed to check the correct balancing of chemical equations.
Rosen, Allen I. J. Chem. Educ. 1977, 54, 704.
Stoichiometry
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A balancing act Schug, Kenneth
A method for teaching introductory students how to balance chemical equations.
Schug, Kenneth J. Chem. Educ. 1977, 54, 370.
Stoichiometry
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Writing chemical equations. An introductory experiment LeMay, H. Eugene, Jr.; Kemp, Kenneth C.
An introductory experiment in which students deduce the products by comparing their observations to descriptions of possible substances and write balanced chemical equations to represent the reactions.
LeMay, H. Eugene, Jr.; Kemp, Kenneth C. J. Chem. Educ. 1975, 52, 121.
Stoichiometry |
Descriptive Chemistry
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A computer program for balancing chemical equations Brown, John P.; Brown, L. Pearl; Redd, Robert M.
Availability of a Fortran IV program that uses the matrix method for balancing chemical equations.
Brown, John P.; Brown, L. Pearl; Redd, Robert M. J. Chem. Educ. 1972, 49, 754.
Stoichiometry |
Reactions
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LTE. Crocker, Roger
The author points out that the objections raised to his earlier work are academic.
Crocker, Roger J. Chem. Educ. 1969, 46, 699.
Stoichiometry |
Chemometrics
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LTE. Algebra and chemical equations Copley, George Novello
The author questions the mathematic validity of the cited work.
Copley, George Novello J. Chem. Educ. 1969, 46, 699.
Stoichiometry |
Chemometrics
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Balancing ionic equations by the method of undetermined coefficients Haas, Rudy; Gayer, Karl H.
Describes a mathematical method for balancing chemical equations.
Haas, Rudy; Gayer, Karl H. J. Chem. Educ. 1962, 39, 537.
Stoichiometry |
Chemometrics
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The mole concept in chemistry (Kieffer, William F.) Eblin, Lawrence P.
Eblin, Lawrence P. J. Chem. Educ. 1962, 39, 488.
Stoichiometry
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The "reaction equivalent" in stoichiometric problems Dorf, Harold
Presents a simplified method for solving all stoichiometric problems based on chemical equations.
Dorf, Harold J. Chem. Educ. 1962, 39, 298.
Stoichiometry
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Writing a chemical equation from titration data: Experiment for general chemistry State, Harold M.
Students titrate phosphoric acid with sodium hydroxide to determine the chemical formula of Na2HPO4.
State, Harold M. J. Chem. Educ. 1962, 39, 297.
Acids / Bases |
Titration / Volumetric Analysis |
Aqueous Solution Chemistry |
Stoichiometry
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Gram equivalent weights Meldrum, William B.
The purpose of this paper is to review briefly the subject of equivalent weights and the more directly applicable gram equivalents and to offer a general method by which they may be deduced from chemical equations.
Meldrum, William B. J. Chem. Educ. 1955, 32, 48.
Nomenclature / Units / Symbols |
Stoichiometry
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On accenting observations in chemistry Campbell, J. A.
A chemical equations is, for many a student, such a complete abstraction that he would be hard put to describe the actual observations that would be made in a process for which he was supplied the complete equation.
Campbell, J. A. J. Chem. Educ. 1951, 28, 634.
Reactions |
Stoichiometry |
Nomenclature / Units / Symbols
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