TIGER

Journal Articles: 20 results
A Simplified Model To Predict the Effect of Increasing Atmospheric CO2 on Carbonate Chemistry in the Ocean  Brian J. Bozlee, Maria Janebo, and Ginger Jahn
The chemistry of dissolved inorganic carbon in seawater is reviewed and used to predict the potential effect of rising levels of carbon dioxide in the atmosphere. It is found that calcium carbonate may become unsaturated in cold surface seawater by the year 2100, resulting in the destruction of calcifying organisms such as coral.
Bozlee, Brian J.; Janebo, Maria; Jahn, Ginger. J. Chem. Educ. 2008, 85, 213.
Applications of Chemistry |
Aqueous Solution Chemistry |
Atmospheric Chemistry |
Equilibrium |
Green Chemistry |
Water / Water Chemistry
Discovering the Thermodynamics of Simultaneous Equilibria. An Entropy Analysis Activity Involving Consecutive Equilibria  Thomas H. Bindel
This activity explores the thermodynamics of simultaneous, consecutive equilibria and is appropriate for second-year high school or AP chemistry. Students discover that a reactant-favored (entropy-diminishing) reaction can be caused to happen if it is coupled with a product-favored reaction of sufficient entropy production.
Bindel, Thomas H. J. Chem. Educ. 2007, 84, 449.
Acids / Bases |
Equilibrium |
Thermodynamics
Teaching Physical Chemistry Experiments with a Computer Simulation by LabVIEW  A. Belletti, R. Borromei, and G. Ingletto
This article reports on a computer simulation developed with the software LabVIEW of the physical chemistry experiment regarding the vapor pressure measurements of a pure liquid as a function of temperature, as well as a system of data collecting that emphasizes the similarities between the virtual and real experiment.
Belletti, A.; Borromei, R.; Ingletto, G. J. Chem. Educ. 2006, 83, 1353.
Equilibrium |
Laboratory Computing / Interfacing |
Liquids |
Thermodynamics |
Gases |
Student-Centered Learning
Modeling Dynamic Equilibrium with Coins  Martin Bartholow
Students explore the concept of equilibrium by moving small objects between two piles.
Bartholow, Martin. J. Chem. Educ. 2006, 83, 48A.
Computational Chemistry |
Equilibrium |
Rate Law
The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems  Paul S. Matsumoto
While my paper states that the reaction quotient (Q) is not needed to solve equilibrium problems, it does not imply that Q is not valuable. In fact, when I teach this topic to my AP chemistry class, I initially use Q to solve the problem, then mention the alternative method described in the paper.
Matsumoto, Paul S. J. Chem. Educ. 2005, 82, 1150.
Equilibrium |
Learning Theories |
Mathematics / Symbolic Mathematics
The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems: No Problems with Q  Robert Lederer
Mr. Matsumotos students are to be congratulated for discerning an interesting mathematical procedure. Exclusively utilizing this algorithm, however, short-cuts the understanding of the chemistry involved. Students of chemistry should be challenged to understand why something occurs, and not to be satisfied with how to perform the often mundane calculations.
Lederer, Robert. J. Chem. Educ. 2005, 82, 1149.
Equilibrium |
Mathematics / Symbolic Mathematics
The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems: The Reaction Quotient (Q) IS Useful After All  Todd P. Silverstein
Paul Matsumoto was absolutely correct in writing The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems.
Silverstein, Todd P. J. Chem. Educ. 2005, 82, 1149.
Equilibrium |
Thermodynamics
The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems: The Reaction Quotient (Q) IS Useful After All  Todd P. Silverstein
Paul Matsumoto was absolutely correct in writing The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems.
Silverstein, Todd P. J. Chem. Educ. 2005, 82, 1149.
Equilibrium |
Thermodynamics
Unified Approximations: A New Approach for Monoprotic Weak Acid–Base Equilibria  Harry L. Pardue, Ihab N. Odeh, and Teweldemedhin M. Tesfai
This article describes a new approach to approximate calculations for monoprotic acidbase equilibria in otherwise pure water. The new approach, identified herein as unified approximations, uses a simple decision criterion to select between situations that should be treated as deprotonation and protonation reactions. The remaining treatment takes account of changes in concentrations of conjugate acidbase pairs for all situations and ignores autoprotolysis only for situations for which the analytical concentration of either the conjugate acid or conjugate base will always be larger than zero.
Pardue, Harry L.; Odeh, Ihab N.; Tesfai, Teweldemedhin M. J. Chem. Educ. 2004, 81, 1367.
Acids / Bases |
Equilibrium |
Chemometrics
Simulating Dynamic Equilibria: A Class Experiment  John A. Harrison and Paul D. Buckley
A first-order reversible reaction is simulated on an overhead projector using small coins or discs. Results illustrate how dynamic equilibria are established and allow the introduction of the concept of an equilibrium constant. Le Chtelier's principle is illustrated by further simulations.
Harrison, John A.; Buckley, Paul D. J. Chem. Educ. 2000, 77, 1013.
Equilibrium |
Rate Law |
Reactions
Simulations for Teaching Chemical Equilibrium  Penelope A. Huddle, Margaret Dawn White, and Fiona Rogers
This paper outlines a systematic approach to teaching chemical equilibrium using simulation experiments that address most known alternate conceptions in the topic. Graphs drawn using the data from the simulations are identical to those obtained using real experimental data for reactions that go to equilibrium. This allows easy mapping of the analogy to the target.
Huddle, Penelope Ann; White, Margaret Dawn; Rogers, Fiona. J. Chem. Educ. 2000, 77, 920.
Equilibrium |
Learning Theories
Graphing Calculator Strategies for Solving Chemical Equilibrium Problems  Henry Donato Jr.
A general method for finding the roots of polynomial equations using the ubiquitous and inexpensive graphing calculator is presented. It is suggested that important reactions, which are not discussed in introductory chemistry courses because of computational considerations, may now be discussed.
Donato, Henry, Jr. J. Chem. Educ. 1999, 76, 632.
Aqueous Solution Chemistry |
Learning Theories |
Equilibrium
The Complexity of Teaching and Learning Chemical Equilibrium  Louise Tyson, David F. Treagust, and Robert B. Bucat
This paper discusses three key issues relevant to secondary school chemistry teaching. They arise from a study of students' understanding of chemical equilibrium using qualitative and quantitative research methods.
Tyson, Louise; Treagust, David F.; Bucat, Robert B. J. Chem. Educ. 1999, 76, 554.
Equilibrium |
Learning Theories
Equilibrium: A Teaching/Learning Activity  Audrey H. Wilson
This article describes hands-on activities for high-school or undergraduate students designed to clarify important concepts involved in early studies of equilibrium. Concepts included are that at equilibrium, rate of forward reaction = rate of backward reaction; concentrations of both reactants and products remain constant; the equilibrium constant is constant at the same temperature but changes as the temperature changes; and equilibrium may be approached from different starting points.
Wilson, Audrey H. J. Chem. Educ. 1998, 75, 1176.
Equilibrium
Teaching Chemical Equilibrium and Thermodynamics in Undergraduate General Chemistry Classes  Anil C. Banerjee
Discussion of the conceptual difficulties experienced by undergraduates when dealing with equilibrium and thermodynamics, along with teaching strategies for dealing with these difficulties.
Banerjee, Anil C. J. Chem. Educ. 1995, 72, 879.
Equilibrium |
Thermodynamics
REACT: Exploring Practical Thermodynamic and Equilibrium Calculations  Ramette, Richard W.
Description of REACT software to balance complicated equations; determine thermodynamic data for all reactants and products; calculate changes in free energy, enthalpy, and entropy for a reaction; and find equilibrium conditions for the a reaction.
Ramette, Richard W. J. Chem. Educ. 1995, 72, 240.
Stoichiometry |
Equilibrium |
Thermodynamics |
Chemometrics
Monitoring self-association of a hydrophobic peptide with high performance liquid chromatography: An undergraduate kinetic experiment using the antibiotic gramicidin A  Braco, Lorenzo; Ba, M. Carmen; Abad, Concepcin
The authors propose a kinetic experiment that uses high performance liquid chromatography to determine the rate and equilibrium constants in a very simple manner, and separate the molecular species under study.
Braco, Lorenzo; Ba, M. Carmen; Abad, Concepcin J. Chem. Educ. 1992, 69, A113.
HPLC |
Kinetics |
Proteins / Peptides |
Rate Law |
Equilibrium
Solving equilibrium constant expressions using spreadsheets  Metz, Clyde; Donato, Henry, Jr.
Description and application of solving equilibrium constant expressions using spreadsheets.
Metz, Clyde; Donato, Henry, Jr. J. Chem. Educ. 1989, 66, A241.
Equilibrium
On the chemically impossible "other" roots in equilibrium problems  Ludwig, Oliver G.
Students often have a hard time knowing when to disregard equilibrium roots that are too large or are negative. The author suggests a convincing proof that helps students understand how the relationship between the conceptual and mathematical.
Ludwig, Oliver G. J. Chem. Educ. 1983, 60, 547.
Equilibrium |
Chemometrics
An experimental program on chemical equilibrium  Reusch, R. N.; Carnell, P. H.
Describes the development and evaluation of a program on chemical equilibrium
Reusch, R. N.; Carnell, P. H. J. Chem. Educ. 1963, 40, 27.
Equilibrium