Journal Articles: 59 results 

Using Pooled Data and Data Visualization To Introduce Statistical Concepts in the General Chemistry Laboratory Robert J. Olsen This article describes how data pooling and visualization can be employed in the firstsemester general chemistry laboratory to introduce core statistical concepts such as central tendency and dispersion of a data set. Olsen, Robert J. J. Chem. Educ. 2008, 85, 544.
Chemometrics 
Stoichiometry

CrossProportions: A Conceptual Method for Developing Quantitative ProblemSolving Skills Elzbieta Cook and Robert L. Cook This paper focuses attention on the crossproportion (CP) method of mathematical problem solving, which was once widely used in chemical calculations. We propose that this method regain currency as an alternative to the dimensional analysis (DA) method, particularly in lowerlevel chemistry courses. In recent years, the DA method has emerged as the only problem solving mechanism offered to highschool and general chemistry students in contemporary textbooks, replacing more conceptual methods, CP included. Cook, Elzbieta; Cook, Robert L. J. Chem. Educ. 2005, 82, 1187.
Learning Theories 
Stoichiometry 
Chemometrics 
StudentCentered Learning

Experimental Design and Multiplexed Modeling Using Titrimetry and Spreadsheets Peter de B. Harrington, Erin Kolbrich, and Jennifer Cline Determining the acidity of three vinegar samples using multiplexed titrations and an MS Excel spreadsheet. Harrington, Peter de B.; Kolbrich, Erin; Cline, Jennifer. J. Chem. Educ. 2002, 79, 863.
Acids / Bases 
Chemometrics 
Stoichiometry 
Titration / Volumetric Analysis

CHEMiCALC (4000161) and CHEMiCALC Personal Tutor (4001108), Version 4.0 (by O. Bertrand Ramsay) Scott White and George Bodner CHEMiCALC is a thoughtfully designed software package developed for use by high school and general chemistry students, who will benefit from the personal tutor mode that helps to guide them through unit conversion, empirical formula, molecular weight, reaction stoichiometry, and solution stoichiometry calculations. White, Scott; Bodner, George M. J. Chem. Educ. 1999, 76, 34.
Chemometrics 
Nomenclature / Units / Symbols 
Stoichiometry

Percent Composition and Empirical Formula  A New View George L. Gilbert A new method of obtaining the empirical formula for a compound from its percent composition is proposed. The method involves the determination of a minimum molar mass for the compound based on the percentage of each element, obtaining the lowest common molar mass and using this data to calculate the integer values used in writing the empirical formula. Gilbert, George L. J. Chem. Educ. 1998, 75, 851.
Atomic Properties / Structure 
Stoichiometry 
Chemometrics

Those Baffling Subscripts Arthur W. Friedel and David P. Maloney Study of the difficulties students have in interpreting subscripts correctly and distinguishing atoms from molecules when answering questions and solving problems. Friedel, Arthur W.; Maloney, David P. J. Chem. Educ. 1995, 72, 899.
Nomenclature / Units / Symbols 
Stoichiometry 
Chemometrics

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

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

AnswerSheets Cornelius, Richard Review of a spreadsheetbased program that has modules on significant figures, VSEPR structures, stoichiometry, and unit conversions. Cornelius, Richard J. Chem. Educ. 1993, 70, 460.
VSEPR Theory 
Stoichiometry 
Chemometrics

A mole of M&M's Merlo, Carmela; Turner, Kathleen E. Engaging students by asking the question: How thick would the layer of M&M candies be if we covered the continental United States with a mole of these candies? Compare this to a mole of water. Merlo, Carmela; Turner, Kathleen E. J. Chem. Educ. 1993, 70, 453.
Stoichiometry 
Chemometrics

AnswerSheets Cornelius, Richard Review of a spreadsheetlike program that includes modules on significant figures, conversions, stoichiometry, and VSEPR structures. Cornelius, Richard J. Chem. Educ. 1993, 70, 387.
VSEPR Theory 
Stoichiometry 
Chemometrics

Empirical formulas from atom ratios: A simple method to obtain the integer factors of a rational number Weltin, E. Most textbooks advise students to use a method tantamount to trial and error when they encounter a ratio in empirical formula calculations where it is not immediately apparent what the coefficients should be. The author describes a simple procedure that is an effective way to find the integer factors. Weltin, E. J. Chem. Educ. 1993, 70, 280.
Stoichiometry 
Chemometrics

Measuring Avogadro's number on the overhead projector Solomon, Sally; Hur, Chinhyu A Petri dish filled with water and stearic acid dissolved in petroleum ether upon an overhead projector can be used to introduce the topic of Avogadro's number. Solomon, Sally; Hur, Chinhyu J. Chem. Educ. 1993, 70, 252.
Chemometrics 
Stoichiometry

Using monetary analogies to teach average atomic mass Last, Arthur M.; Webb, Michael J. Some strategies to overcome the frequent problem novice students have with calculating average atomic mass. Last, Arthur M.; Webb, Michael J. J. Chem. Educ. 1993, 70, 234.
Chemometrics 
Stoichiometry

Relative atomic mass and the mole: A concrete analogy to help students understand these abstract concepts de Sanabia, Josefina Arce Suggestions on how to improve student understandings of the mathematical idea of "ratio" to enhance conceptual understanding of this fundamental chemistry concept. de Sanabia, Josefina Arce J. Chem. Educ. 1993, 70, 233.
Chemometrics 
Stoichiometry

Storing solar energy in calcium chloride Wilkins, Curtis C.; Hunter, Norman W.; Pearson, Earl F. Using common chemistry concepts to determine the feasibility of storing solar energy in calcium chloride hexahydrate. Wilkins, Curtis C.; Hunter, Norman W.; Pearson, Earl F. J. Chem. Educ. 1992, 69, 753.
Calorimetry / Thermochemistry 
Stoichiometry 
Chemometrics

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

A straightforward derivation of stoichiometric mass relationships Gorin, George An alternative to the factor label method for solving stoichiometric mass relationship problems. Gorin, George J. Chem. Educ. 1990, 67, 762.
Stoichiometry 
Chemometrics

A stoichiometric journey Molle, Brian A story to help students overcome some of the difficulties they encounter in stoichiometry calculations. Molle, Brian J. Chem. Educ. 1989, 66, 561.
Stoichiometry 
Chemometrics

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

Teaching students to use algorithms for solving generic and harder problems in general chemistry Kean, Elizabeth; Middlecamp, Catherine Hurt; Scott, D. L. This paper describes teaching strategies that help students improve their problemsolving skills. Kean, Elizabeth; Middlecamp, Catherine Hurt; Scott, D. L. J. Chem. Educ. 1988, 65, 987.
Stoichiometry 
Chemometrics

An alternative to using the PV = nRT equation Desmarais, George This author shares his application of the factorlabel method to solving gas problems which involves using the ideal gas constant as the starting point in the relationship. Desmarais, George J. Chem. Educ. 1988, 65, 392.
Gases 
Stoichiometry 
Chemometrics

Avogadro's number: A perverse view Lehman, Thomas A. A way to think of Avogadro's number: take anything and double it 79 times. Lehman, Thomas A. J. Chem. Educ. 1988, 65, 282.
Chemometrics 
Stoichiometry

Reaction stoichiometry and suitable "coordinate systems" Tykodi, R. J. Methods for dealing with problems involving reactions stoichiometry: unitize and scale up, factorlabel procedure, de Donder ratios, and titration relations. Tykodi, R. J. J. Chem. Educ. 1987, 64, 958.
Stoichiometry 
Titration / Volumetric Analysis 
Chemometrics

Hard ways and easy ways Schwartz, Lowell M. Two examples of common general chemistry calculations and different approaches ("hard" and "easy") to solving them. Schwartz, Lowell M. J. Chem. Educ. 1987, 64, 698.
Stoichiometry 
Chemometrics

Solving limiting reagent problems (the author replies) Kalantar, A. H. Thanks for clarification and suggestion. Kalantar, A. H. J. Chem. Educ. 1987, 64, 472.
Stoichiometry 
Chemometrics

Solving limiting reagent problems Skovlin, Dean O. Uncertainty in the meaning of the term X. Skovlin, Dean O. J. Chem. Educ. 1987, 64, 472.
Stoichiometry 
Chemometrics

Mole fraction revisited Mancott, A. This problem requires the use of algebraic reasoning to derive and solve a fraction linear equation based on the concept of moles and conservation of moles. Mancott, A. J. Chem. Educ. 1987, 64, 320.
Stoichiometry 
Chemometrics

A flowchart for dimensional analysis Graham, D. M. A flowchart to help students organize their thoughts when solving conversion problems. Graham, D. M. J. Chem. Educ. 1986, 63, 527.
Chemometrics 
Nomenclature / Units / Symbols 
Stoichiometry

Unit basis a neglected problemsolving technique Beichl, George J. A technique that will prevent students from using ineffective problemsolving techniques such as dimensional analysis. Beichl, George J. J. Chem. Educ. 1986, 63, 146.
Chemometrics 
Stoichiometry

On writing equations Campbell, J.A. The author presents a very direct approach to writing complicated equations without using a matrix approach. Campbell, J.A. J. Chem. Educ. 1986, 63, 63.
Stoichiometry 
Chemometrics

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

Pandemonium pesticide: A simple demonstration illustrating some fundamental chemical concepts Kauffman, George B.; Chooljian, Steven H.; Ebner, Ronald D. Demonstration that uses large, visible particles to simulate calculations of atomic / molecular mass, percentage composition, and molecular formula. Kauffman, George B.; Chooljian, Steven H.; Ebner, Ronald D. J. Chem. Educ. 1985, 62, 870.
Atomic Properties / Structure 
Molecular Properties / Structure 
Stoichiometry 
Chemometrics

Mathematics in the chemistry classroom. Part 1. The special nature of quantity equations Dierks, Werner; Weninger, Johann; Herron, J. Dudley Differences between operation on quantities and operation on numbers and how chemical quantities should be described mathematically. Dierks, Werner; Weninger, Johann; Herron, J. Dudley J. Chem. Educ. 1985, 62, 839.
Chemometrics 
Stoichiometry 
Nomenclature / Units / Symbols

Using a conversion matrix to simplify stoichiometric calculations from balanced equations Berger, Selman A. Two examples of using a conversion matrix to simplify stoichiometric calculations from balanced equations. Berger, Selman A. J. Chem. Educ. 1985, 62, 396.
Chemometrics 
Stoichiometry

Problemsolving skills in chemistry made easier Fast, Kenneth V. Stepbystep format for performing common calculations in chemistry. Fast, Kenneth V. J. Chem. Educ. 1985, 62, 396.
Stoichiometry 
Chemometrics

Limiting reagent problems made simple for students Kalantar, A. H. Method for determining the limiting reagent among three or more reactants. Kalantar, A. H. J. Chem. Educ. 1985, 62, 106.
Stoichiometry 
Chemometrics

Five Avogadro's number problems Todd, David Five problems involving Avogadro's number. Todd, David J. Chem. Educ. 1985, 62, 76.
Nomenclature / Units / Symbols 
Stoichiometry 
Chemometrics

A LAP on moles: Teaching an important concept Ihde, John The objective of the Learning Activity Packet on moles include understanding the basic concept of the mole as a chemical unit, knowing the relationships between the mole and the atomic weights in the periodic table, and being able to solve basic conversion problems involving grams, moles, atoms, and molecules. [Debut] Ihde, John J. Chem. Educ. 1985, 62, 58.
Stoichiometry 
Nomenclature / Units / Symbols 
Chemometrics 
Atomic Properties / Structure 
Molecular Properties / Structure 
Periodicity / Periodic Table

Teaching factorlabel method without sleight of hand Garrett, James M. As an aid in teaching the factorlabel method, the author has developed a rather simple card game involving the matching of symbols and colors. Garrett, James M. J. Chem. Educ. 1983, 60, 962.
Stoichiometry 
Chemometrics 
Nomenclature / Units / Symbols

The liquid silver parade Perkins, Robert The activity described in this note is useful in illustrating how small atoms are to students. Perkins, Robert J. Chem. Educ. 1983, 60, 343.
Stoichiometry 
Chemometrics

The estimation of Avogadro's number using cetyl alcohol as the monolayer Feinstein, H. I.; Sisson, Robert F., III Results and calculations using cetyl alcohol as the monolayer in estimating Avogadro's number. Feinstein, H. I.; Sisson, Robert F., III J. Chem. Educ. 1982, 59, 751.
Stoichiometry 
Molecular Properties / Structure 
Chemometrics

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

Balancing complex redox equations by inspection Kolb, Doris A stepbystep walk through of the inspection process for balancing equations. Kolb, Doris J. Chem. Educ. 1981, 58, 642.
Stoichiometry 
Chemometrics

How big is Avogadro's number (or how small are atoms, molecules and ions) Fulkrod, John E. Calculating the volume occupied by Avogadro's number of drops of water helps students understand the magnitude of this quantity while giving them practice at using scientific notation and the metric system. Fulkrod, John E. J. Chem. Educ. 1981, 58, 508.
Nomenclature / Units / Symbols 
Chemometrics 
Stoichiometry

Pressure and the exploding beverage container Perkins, Robert R. The question in this article is an extension of exploding pop bottles to illustrate the balancing of a chemical equation, enthalpy, stoichiometry, and vapor pressure calculations, and the use of the Ideal Gas Equation. The question is aimed at the firstyear level student. Perkins, Robert R. J. Chem. Educ. 1981, 58, 363.
Stoichiometry 
Gases 
Thermodynamics 
Chemometrics

Mole fraction analogies DeLorenzo, Ron An analogy to help students solve concentration problems. DeLorenzo, Ron J. Chem. Educ. 1980, 57, 733.
Stoichiometry 
Chemometrics 
Solutions / Solvents

A "road map" problem for freshman chemistry students Burness, James H. Question suitable for a takehome type of exam. Burness, James H. J. Chem. Educ. 1980, 57, 647.
Gases 
Solutions / Solvents 
Stoichiometry 
Nomenclature / Units / Symbols 
Chemometrics

Balancing an atypical redox equation Carrano, S. A. The author presents a particularly tricky redox problem and walks readers through a solution. Carrano, S. A. J. Chem. Educ. 1978, 55, 382.
Chemometrics 
Oxidation / Reduction 
Stoichiometry

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

Cookbook dimensional analysis DeLorenzo, Ronald Frequently, teachers will hear, "...it looks easy when you do it..." when teaching dimensional analysis. This teacher advises others on a way to help students gain selfefficacy with this problem solvingstrategy. DeLorenzo, Ronald J. Chem. Educ. 1976, 53, 633.
Stoichiometry 
Chemometrics

A logic diagram for teaching stoichiometry Tyndall, John R. Presents a diagram that the author found helpful in teaching the fundamentals of stoichiometry. Tyndall, John R. J. Chem. Educ. 1975, 52, 492.
Stoichiometry 
Chemometrics

Illustrating large and small numbers. A problem for the birds Sattler, Louis A calculation designed to illustrate the relative size of Avogadro's number. The solution from p. 181 is reproduced in this PDF. Sattler, Louis J. Chem. Educ. 1975, 52, 180.
Chemometrics 
Stoichiometry

Grading the copper sulfide experiment Novick, Seymour The author recommends a more liberal analysis in grading the copper sulfide experiment. Novick, Seymour J. Chem. Educ. 1970, 47, 785.
Stoichiometry 
Chemometrics

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

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

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

Initial ratio of reactants to give, at equilibrium, a maximum yield of products Haslam, E. Derivation of the initial ratio of reactants to give, at equilibrium, a maximum yield of products. Haslam, E. J. Chem. Educ. 1958, 35, 471.
Stoichiometry 
Chemometrics

Solution of problems in chemistry Trousdale, Everett A. Presents a method for analyzing and solving mole calculations. Trousdale, Everett A. J. Chem. Educ. 1958, 35, 299.
Chemometrics 
Stoichiometry

