Journal Articles: 12 results 

The Reaction Quotient Is Unnecessary To Solve Equilibrium Problems Paul S. Matsumoto The traditional method to determine the equilibrium concentration of chemicals in a reaction, given the equilibrium constant and the initial concentration of chemicals in the reaction, involves the determination of the reaction quotient. This article will demonstrate that this step may be eliminated; thereby simplifying the algorithm to solve such problems. Such a reduction in the complexity of the algorithm may result in more students successfully being able to solve such problems. Matsumoto, Paul S. J. Chem. Educ. 2005, 82, 406.
Equilibrium 
Learning Theories 
Chemometrics

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 acidbase 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 acidbase 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

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

Equilibrium Calculator Allendoerfer, Robert The equilibrium calculator can calculate the equilibrium concentrations of all reagents in an arbitrary chemical reaction with as many as five reactants and products. Allendoerfer, Robert J. Chem. Educ. 1993, 70, 126.
Equilibrium 
Chemometrics

Chemical equilibrium: III. A few math tricks Gordus, Adon A. The third article in a series on chemical equilibrium that considers a few math "tricks" useful in equilibrium calculations and approximations. Gordus, Adon A. J. Chem. Educ. 1991, 68, 291.
Acids / Bases 
Equilibrium 
Chemometrics 
Titration / Volumetric Analysis

Chemical equilibrium: II. Deriving an exact equilibrium equation Gordus, Adon A. In this article appearing in a series on chemical equilibrium, authors consider how to derive a completely general equation for any chemical mixture. Gordus, Adon A. J. Chem. Educ. 1991, 68, 215.
Equilibrium 
Chemometrics

Solving quadratic equations Brown, R. J. C. A better technique than the quadratic equation for chemical equilibria is offered here. Brown, R. J. C. J. Chem. Educ. 1990, 67, 409.
Chemometrics 
Equilibrium

Le Châtelier's principle: the effect of temperature on the solubility of solids in liquids Brice, L. K. The purpose of this article is to provide a rigorous but straightforward thermodynamic treatment of the temperature dependence of solubility of solids in liquids that is suitable for presentation at the undergraduate level. The present discussion may suggest how to approach the qualitative aspects of the subject for freshman. Brice, L. K. J. Chem. Educ. 1983, 60, 387.
Thermodynamics 
Liquids 
Solids 
Chemometrics 
Equilibrium

Intuitive and general approach to acidbase equilibrium calculations Felty, Wayne L. The purpose of this paper is to show that the usual intuitive approach used in general chemistry can be readily extended without introduction of additional, sophisticated concepts to give the general, exact expression and to point out the pedagogical advantage of its use. Felty, Wayne L. J. Chem. Educ. 1978, 55, 576.
Acids / Bases 
Equilibrium 
Chemometrics

Molar solubility calculations and the control equilibrium Chaston, S. H. H. The ControlEquilibrium method uses as its starting point a precise procedure for obtaining the equilibrium that accounts for the bulk of the decomposition of starting materials. Chaston, S. H. H. J. Chem. Educ. 1975, 52, 206.
Solutions / Solvents 
Chemometrics 
Equilibrium

Component concentrations in solutions of weak acids Goldish, Dorothy M. presents a new approach to teaching the subject of weak acid equilibria and its associated calculations. Goldish, Dorothy M. J. Chem. Educ. 1970, 47, 65.
Acids / Bases 
Aqueous Solution Chemistry 
Equilibrium 
Chemometrics 
pH

A procedure for solving equilibrium problems Boyd, Robert Neilson A procedure for solving equilibrium problems is illustrated through several sample problems. Boyd, Robert Neilson J. Chem. Educ. 1952, 29, 198.
Equilibrium 
Chemometrics 
Aqueous Solution Chemistry

