TIGER

Journal Articles: 97 results
Diamagnetic Corrections and Pascal's Constants  Gordon A. Bain and John F. Berry
This article presents an explanation for the origin of diamagnetic correction factors, comprehensive tables of diamagnetic constants and their application to calculate diamagnetic susceptibility, and a simple method for estimating the correct order of magnitude for the diamagnetic correction for any given compound.
Bain, Gordon A.; Berry, John F. J. Chem. Educ. 2008, 85, 532.
Laboratory Computing / Interfacing |
Magnetic Properties |
Molecular Properties / Structure |
Physical Properties |
Transition Elements
Origin of the Formulas of Dihydrogen and Other Simple Molecules  Andrew Williams
The logic and experimental data are described with which chemists originally deduced the formulas of fundamental substances such as H2, H2O, Cl2, NH3, CH4, and HCl. It is argued that high school and first-year undergraduate students would gain substantially from exposure to this process.
Williams, Andrew. J. Chem. Educ. 2007, 84, 1779.
Enrichment / Review Materials |
Molecular Properties / Structure
Dancing Crystals: A Dramatic Illustration of Intermolecular Forces  Donald W. Mundell
Crystals of naphthalene form on the surface of an acetone solution and dance about in an animated fashion illustrating surface tension, crystallization, and intermolecular forces. Additional experiments reveal the properties of the solution and previous demonstrations of surface motion are explored.
Mundell, Donald W. J. Chem. Educ. 2007, 84, 1773.
Aromatic Compounds |
Liquids |
Molecular Mechanics / Dynamics |
Molecular Properties / Structure |
Physical Properties |
Surface Science |
Noncovalent Interactions
Teaching Structure–Property Relationships: Investigating Molecular Structure and Boiling Point  Peter M. Murphy
The boiling points for 392 organic compounds are tabulated by carbon chain length and functional group to facilitate a wide range of inquiry-based activities that correlate the effects of chemical structure on physical properties.
Murphy, Peter M. J. Chem. Educ. 2007, 84, 97.
Molecular Properties / Structure |
Physical Properties
A Polymer in Everyday Life: The Isolation of Poly(vinyl alcohol) from Aqueous PVA Glues. An Undergraduate Chemistry Experiment   Yueh-Huey Chen and Jing-Fun Yaung
The IR spectra of three common and related polymers are used to identify functional groups and rationalize molecular structures.
Chen, Yueh-Huey; Yaung, Jing-Fun. J. Chem. Educ. 2006, 83, 1534.
Applications of Chemistry |
Aqueous Solution Chemistry |
Esters |
IR Spectroscopy |
Molecular Properties / Structure
From "Greasy Chemistry" to "Macromolecule": Thoughts on the Historical Development of the Concept of a Macromolecule  Pedro J. Bernal
This paper presents a narrative about the historical development of the concept of a macromolecule. It does so to illustrate how the history of science might be used as a pedagogical tool to teach science, particularly to non-majors.
Bernal, Pedro J. J. Chem. Educ. 2006, 83, 870.
Colloids |
Nonmajor Courses |
Polymerization |
Molecular Properties / Structure |
Physical Properties
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
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
Empirical Formulas and the Solid State: A Proposal  William B. Jensen
This brief article calls attention to the failure of most introductory textbooks to point out explicitly the fact that nonmolecular solids do not have molecular formulas and suggests some practical remedies for improving textbook coverage of this subject. The inadequacies of the terms "empirical formula" and "molecular formula" are also discussed, and the terms "relative compositional formula" and "absolute compositional formula" are proposed as more appropriate alternatives.
Jensen, William B. J. Chem. Educ. 2004, 81, 1772.
Solid State Chemistry |
Solids |
Stoichiometry |
Nomenclature / Units / Symbols
The Singlet States of Molecular Oxygen   Jean-Pierre Puttemans and Georges Jannes
Although the purpose of the article The Visible Spectrum of Liquid Oxygen in the General Chemistry Laboratory is an analysis of the two-moleculesone-photon absorption spectrum of oxygen, it nevertheless assigns arrangements of the electrons in an energy diagram to the two singlet states of molecular oxygen which do not seem to be correct in our opinion.
Puttemans, Jean-Pierre; Jannes, Georges. J. Chem. Educ. 2004, 81, 639.
Molecular Properties / Structure |
MO Theory |
UV-Vis Spectroscopy
The Origin of Stoichiometry Problems  William B. Jensen
In response to a reader query, the column discusses the question of when quantitative stoichiometry problems first began to appear in introductory textbooks, and especially the role of the American chemist, Josiah Parsons Cooke, in this process.
Jensen, William B. J. Chem. Educ. 2003, 80, 1248.
Stoichiometry
Modern Sport and Chemistry: What a Chemically Aware Sports Fanatic Should Know  Guinevere A. Giffin, Steven R. Boone, Renée S. Cole, Scott E. McKay, and Robert Kopitzke
Summary of the chemistry of a variety of sports and athletics; topics include golf, football, tennis, and hockey, as well as sports medicine, performance-enhancing drugs, sports supplements and drinks, and the couch potato.
Giffin, Guinevere A.; Boone, Steven R.; Cole, Renée S.; McKay, Scott E.; Kopitzke, Robert. J. Chem. Educ. 2002, 79, 813.
Consumer Chemistry |
Applications of Chemistry |
Molecular Properties / Structure
A Simple Experiment for the Determination of Molecular Weights of Gases Lighter Than Air  Van T. Lieu and Gene E. Kalbus
A simple method for the determination of molecular weights of gases lighter than air.
Lieu, Van T.; Kalbus, Gene E. J. Chem. Educ. 2002, 79, 473.
Gases |
Molecular Properties / Structure |
Physical Properties
Using History to Teach Scientific Method: The Role of Errors  Carmen J. Giunta
This paper lists five kinds of error with examples of each from the development of chemistry in the 18th and 19th centuries: erroneous theories (phlogiston), seeing a new phenomenon everywhere one seeks it (Lavoisier and the decomposition of water), theories erroneous in detail but nonetheless fruitful (Dalton's atomic theory), rejection of correct theories (Avogadro's hypothesis), and incoherent insights (J. A. R. Newlands' classification of the elements).
Giunta, Carmen J. J. Chem. Educ. 2001, 78, 623.
Nonmajor Courses |
Periodicity / Periodic Table |
Kinetic-Molecular Theory |
Stoichiometry
Infrared Spectroscopy in the General Chemistry Lab  Margaret A. Hill
Three laboratory exercises in which students learn to interpret infrared spectra for simple structural identification. A polymer identification lab uses familiar household polymer samples and teaches students how to use infrared spectral data to determine what bond types are present in the polymers. In a second lab, students learn to prepare potassium bromide pellets of fluorene derivatives and identify them by their functional group differences. The final exercise combines IR with several other lab techniques to identify an organic acid from a field of fourteen possibilities.
Hill, Margaret A. J. Chem. Educ. 2001, 78, 26.
Instrumental Methods |
IR Spectroscopy |
Molecular Properties / Structure
No, the Molecular Mass of Bromobenzene Is Not 157 amu: An Exercise in Mass Spectrometry and Isotopes for Early General Chemistry  Steven M. Schildcrout
Even with no background in bonding and structure, students can successfully interpret the output of a modern research instrument. They learn to identify an isotope pattern, assign chemical formulas to ions giving mass spectral peaks, calculate an average atomic weight (for bromine) from measured isotopic abundances, and write balanced equations for ion fragmentation reactions.
Schildcrout, Steven M. J. Chem. Educ. 2000, 77, 1433.
Isotopes |
Mass Spectrometry |
Atomic Properties / Structure |
Molecular Properties / Structure
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
Intermolecular Forces in Introductory Chemistry Studied by Gas Chromatography, Computer Models, and Viscometry  Jonathan C. Wedvik, Charity McManaman, Janet S. Anderson, and Mary K. Carroll
Students performing gas chromatographic (GC) analyses of mixtures of n-alkanes and samples that simulate crime scene evidence discover that liquid mixtures can be separated rapidly into their components based upon intermolecular forces. Each group of students is given a liquid sample that simulates one collected at an arson scene, and the group is required to determine the identity of the accelerant. Students also examine computer models to better visualize how molecular structure affects intermolecular forces: London forces, dipole-dipole interactions, and hydrogen bonding.
Wedvik, Jonathan C.; McManaman, Charity; Anderson, Janet S.; Carroll, Mary K. J. Chem. Educ. 1998, 75, 885.
Theoretical Chemistry |
Chromatography |
Noncovalent Interactions |
Gas Chromatography |
Molecular Modeling |
Forensic Chemistry |
Alkanes / Cycloalkanes |
Hydrogen Bonding |
Molecular Properties / Structure
CheMentor Software System by H. A. Peoples  reviewed by Brian P. Reid
CheMentor is a series of software packages for introductory-level chemistry, which includes Practice Items (I), Stoichiometry (I), Calculating Chemical Formulae, and the CheMentor Toolkit.
Reid, Brian P. J. Chem. Educ. 1997, 74, 1047.
Stoichiometry
A General Chemistry Experiment Incorporating Synthesis and Structural Determination  Hal Van Ryswyk
An experiment for the general chemistry laboratory is described wherein gas chromatography-mass spectroscopy (GC-MS) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) are used to characterize the products of a series of microscale reactions on vanillin.
Van Ryswyk, Hal. J. Chem. Educ. 1997, 74, 842.
Instrumental Methods |
Microscale Lab |
Synthesis |
Molecular Properties / Structure |
Gas Chromatography |
Mass Spectrometry |
Fourier Transform Techniques |
Spectroscopy
A Simple, Discovery-Based Laboratory Exercise: The Molecular Mass Determination of Polystyrene  Greg A. Slough
Identification of an unknown polymer using silica gel TLC sheets and IR spectroscopy.
Slough, Greg A. J. Chem. Educ. 1995, 72, 1031.
Stoichiometry |
IR Spectroscopy |
Molecular Properties / Structure |
Thin Layer Chromatography
Conservation of Matter  Meyer, Edwin F.
Letter pointing out that the demonstration referred to allows a quantitative measurement of the molecular weight of carbon dioxide.
Meyer, Edwin F. J. Chem. Educ. 1995, 72, 764.
Physical Properties |
Stoichiometry
Illustration of Mn and Mw in chain-growth polymerization using a simplified model: An undergraduate polymer chemistry laboratory exercise  Snyder, Donald M.
This exercise helps to attain three pedagogical objectives. Laying out the chains illustrates that a polymer is composed of a mixture of various chain lengths, the random-number assembly of the chain illustrates the statistical aspects of chain growth, the limited number of chains and chain length of the chain allows direct calculation of the number of chains and the weight averages of the chains.
Snyder, Donald M. J. Chem. Educ. 1992, 69, 422.
Physical Properties |
Molecular Properties / Structure
A BASIC program for computing reactant combinations from approximate elemental analysis data  Senthilkumar, Udayampalayam P.; Vijayalakshmi, Rajagopalan; Jeyaraman, Ramasubbu
129. A computer program has been developed for determining the number of moles of reactants participating in a reaction in addition to calculating the molecular formula for the analytical data.
Senthilkumar, Udayampalayam P.; Vijayalakshmi, Rajagopalan; Jeyaraman, Ramasubbu J. Chem. Educ. 1991, 68, 773.
Laboratory Computing / Interfacing |
Stoichiometry |
Quantitative Analysis
Molecular weight determination by boiling-point elevation of a urea solution  Thomas, Nicholas C.; Saisuwan, Patsy
Avoids the problems associated with determining the molecular weight of an unknown by measuring the freezing-point depression of the unknown in naphthalene solution.
Thomas, Nicholas C.; Saisuwan, Patsy J. Chem. Educ. 1990, 67, 971.
Molecular Properties / Structure |
Physical Properties
Avogadro's number, moles, and molecules  McCullough, Thomas, CSC
A simple diagram that relates Avogadro's number, moles, and number of atoms / molecules.
McCullough, Thomas, CSC J. Chem. Educ. 1990, 67, 783.
Nomenclature / Units / Symbols |
Stoichiometry
Analysis of organic acids: A freshman laboratory experiment  Griswold, John R.; Rauner, Richard A.
In this experiment students select unknown carboxylic acids, determine their melting points, and investigate their solubility behavior in water and ethanol.
Griswold, John R.; Rauner, Richard A. J. Chem. Educ. 1990, 67, 516.
Acids / Bases |
Titration / Volumetric Analysis |
Stoichiometry |
Precipitation / Solubility
A proposition about the quantity of which mole is the SI unit  Rocha-Filho, Romeu C.
In this note, after a brief review of the evolution of the meaning of the term mole and a discussion of intrinsic properties of matter, it is proposed that the quantity measured using the SI base unit mole is numerousness, an intrinsic property of samples of matter.
Rocha-Filho, Romeu C. J. Chem. Educ. 1990, 67, 139.
Stoichiometry
Stoichiometry to the rescue (a calculation challenge)   Ramette, Richard W.
Presentation of a question that would be suitable for a take-home exam or a problem set in a general or analytical chemistry course.
Ramette, Richard W. J. Chem. Educ. 1988, 65, 800.
Amines / Ammonium Compounds |
Gases |
Stoichiometry
A multi-topic problem for general chemistry   Burness, James H.
A 'marathon' problem which requires specific knowledge in several areas while requiring that the student recognize how these areas are related.
Burness, James H. J. Chem. Educ. 1988, 65, 145.
Stoichiometry |
Transport Properties |
Electrolytic / Galvanic Cells / Potentials |
Crystals / Crystallography
Reaction stoichiometry and suitable "coordinate systems"  Tykodi, R. J.
Methods for dealing with problems involving reactions stoichiometry: unitize and scale up, factor-label procedure, de Donder ratios, and titration relations.
Tykodi, R. J. J. Chem. Educ. 1987, 64, 958.
Stoichiometry |
Titration / Volumetric Analysis |
Chemometrics
An aqueous problem with an interesting solution  Thomas, Nicholas C.
Flow diagram outlining the steps to calculating the number of water molecules in one drop of water and the length of all these molecules stretched end to end.
Thomas, Nicholas C. J. Chem. Educ. 1987, 64, 611.
Water / Water Chemistry |
Stoichiometry
Classroom demonstrations of polymer principles. Part I. Molecular structure and molecular mass  Rodriguez, F.; Mathias, L. J.; Kroschwitz, J.; Carraher, C. E., Jr.
Suggestions for models and techniques to illustrate the structure of polymers, copolymers, molecular mass, osmotic pressure, light scattering, and dilute solution viscosity.
Rodriguez, F.; Mathias, L. J.; Kroschwitz, J.; Carraher, C. E., Jr. J. Chem. Educ. 1987, 64, 72.
Molecular Properties / Structure |
Physical Properties
A BASIC program for the calculation of elemental compositions from structural formulas  Smith, Roger A.; Spencer, Robin W.
78. Bits and pieces, 32. The authors have written a computer program in BASIC that will calculate the molecular weights and elemental compositions from a structural formula.
Smith, Roger A.; Spencer, Robin W. J. Chem. Educ. 1986, 63, 1076.
Molecular Properties / Structure |
Stereochemistry
FACES (features associated with chemical entities): II. Hydrocarbon isomers and their graphs  Larsen, Russell D.
The FACES program is modified in order to be able to display the structural features of compounds.
Larsen, Russell D. J. Chem. Educ. 1986, 63, 1067.
Molecular Properties / Structure
What can we do about Sue: A case study of competence  Herron, J. Dudley; Greenbowe, Thomas J.
A case study of a "successful" student who is representative of other successful students that are not prepared to solve novel problems.
Herron, J. Dudley; Greenbowe, Thomas J. J. Chem. Educ. 1986, 63, 528.
Stoichiometry |
Learning Theories
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
Why teach the gas laws?  Davenport, Derek A.
Justification for teaching the gas laws.
Davenport, Derek A. J. Chem. Educ. 1985, 62, 505.
Gases |
Stoichiometry
The density and apparent molecular weight of air  Harris, Arlo D.
Simple procedure for determining the density and apparent molecular weight of air.
Harris, Arlo D. J. Chem. Educ. 1984, 61, 74.
Atmospheric Chemistry |
Gases |
Molecular Properties / Structure |
Physical Properties
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
On the crosslinked structure of rubber: Classroom demonstration or experiment: A quantitative determination by swelling  Sperling, L. H.; Michael, T. C.
Uses a rubber band to examine the crosslinked behavior of rubber.
Sperling, L. H.; Michael, T. C. J. Chem. Educ. 1982, 59, 651.
Applications of Chemistry |
Polymerization |
Molecular Properties / Structure
Setting high standards   Feinstein, H. I.
A question is contributed that will scaffold student learning of quantitative analysis skills.
Feinstein, H. I. J. Chem. Educ. 1981, 58, 567.
Quantitative Analysis |
Stoichiometry
Protein denaturation: A physical chemistry project lab  Pickering, Miles; Crabtree, Robert H.
This experiment links physical chemistry with biology and can be done with in advanced freshman course.
Pickering, Miles; Crabtree, Robert H. J. Chem. Educ. 1981, 58, 513.
Proteins / Peptides |
Biophysical Chemistry |
Molecular Properties / Structure
A "road map" problem for freshman chemistry students  Burness, James H.
Question suitable for a take-home type of exam.
Burness, James H. J. Chem. Educ. 1980, 57, 647.
Gases |
Solutions / Solvents |
Stoichiometry |
Nomenclature / Units / Symbols |
Chemometrics
Entropy and rubbery elasticity  Nash, Leonard K.
Thermodynamic analysis of the polymeric molecules of rubber.
Nash, Leonard K. J. Chem. Educ. 1979, 56, 363.
Thermodynamics |
Molecular Properties / Structure |
Statistical Mechanics
The aromatic ring  Kolb, Doris
Historic analysis and attempts to explain the structure of benzene, the concept of resonance, Huckel's rule, polycyclic aromatic compounds, non-classical aromatic compounds, and a definition for aromaticity.
Kolb, Doris J. Chem. Educ. 1979, 56, 334.
Aromatic Compounds |
Molecular Properties / Structure |
Resonance Theory
Plastics: Utilizing the properties of string-like molecules  J. Chem. Educ. Staff
A summary of the properties of common polymers.
J. Chem. Educ. Staff J. Chem. Educ. 1979, 56, 42.
Polymerization |
Molecular Properties / Structure |
Applications of Chemistry
The chemical formula. Part I: Development  Kolb, Doris
The origin of the chemical formula, the problem of isomers, nucleus theory, radical theories, residue theory, type theory, extension of the type theory, valence theory, graphic formulas, and contribution of Cannizzaro.
Kolb, Doris J. Chem. Educ. 1978, 55, 44.
Stoichiometry
Synthesis in an integrated curriculum  Yoder, Claude H.
Outline of a four-year chemistry program culminating in a senior course "Synthesis and Determination of Structure," for which a separate outline is provided.
Yoder, Claude H. J. Chem. Educ. 1977, 54, 572.
Synthesis |
Molecular Properties / Structure
On mole fractions in equilibrium constants  Delaney, C. M.; Nash, Leonard K.
Proposes a hybrid equilibrium constant for use in introductory chemistry courses.
Delaney, C. M.; Nash, Leonard K. J. Chem. Educ. 1977, 54, 151.
Equilibrium |
Stoichiometry |
Aqueous Solution Chemistry |
Solutions / Solvents
Non-covalent interactions: Key to biological flexibility and specificity  Frieden, Earl
Summarizes the types of non-covalent interactions found among biomolecules and how they facilitate the function of antibodies, hormones, and hemoglobin.
Frieden, Earl J. Chem. Educ. 1975, 52, 754.
Noncovalent Interactions |
Hydrogen Bonding |
Water / Water Chemistry |
Proteins / Peptides |
Amino Acids |
Molecular Properties / Structure |
Hormones
The identity of chemical substances: A first laboratory experiment for elementary chemistry students  Fernandez, Jack E.
Students are given two pure substances and asked to determine whether they are the same or different.
Fernandez, Jack E. J. Chem. Educ. 1975, 52, 726.
Stoichiometry
A simple model of an a[alpha]-helix  Hiegel, Gene A.
A simple model of an a[alpha]-helix made from a toilet tissue tube.
Hiegel, Gene A. J. Chem. Educ. 1975, 52, 231.
Molecular Properties / Structure |
Molecular Modeling
Reduction of copper(II) oxide by alkanes of low molecular weight  Hoffman, A. B.; Hoffman, A. J.
This paper describes a laboratory where general chemistry students investigate the reduction of CuO by alkanes of low molecular weight.
Hoffman, A. B.; Hoffman, A. J. J. Chem. Educ. 1974, 51, 418.
Oxidation / Reduction |
Molecular Properties / Structure
Determining the molecular weight of N-fatty acids by thin layer chromatography  Singh, Eric J.; Zuspan, Frederick P.
Simple procedure for determining the molecular weight of N-fatty acids by thin layer chromatography.
Singh, Eric J.; Zuspan, Frederick P. J. Chem. Educ. 1973, 50, 625.
Molecular Properties / Structure |
Physical Properties |
Thin Layer Chromatography |
Chromatography |
Fatty Acids
The mole and Avogadro's number. A forced fusion of ideas for teaching purposes  Hawthorne, Robert M., Jr.
History of Avogadro's number and the mole and their increasing association with one another.
Hawthorne, Robert M., Jr. J. Chem. Educ. 1973, 50, 282.
Stoichiometry
The helix coil transition of DNA  Steinert, Roger; Hudson, Bruce
The design and use of a photometer to detect the transition of DNA from the double helix to random coil form.
Steinert, Roger; Hudson, Bruce J. Chem. Educ. 1973, 50, 129.
Molecular Properties / Structure |
Photochemistry |
Spectroscopy |
Laboratory Equipment / Apparatus
A modified Rast method for molecular weights  Wawzonek, Stanley
Avoiding problems associated with the Rast method for determining molecular weights.
Wawzonek, Stanley J. Chem. Educ. 1972, 49, 399.
Molecular Properties / Structure |
Physical Properties
The use of a dye in the Dumas method of determining molecular weight  Tibbetts, Donald L.; Salter, E. Mimie
Using iodine to color a liquid in order to determine when its vaporative heating must be stopped.
Tibbetts, Donald L.; Salter, E. Mimie J. Chem. Educ. 1972, 49, 182.
Dyes / Pigments |
Physical Properties |
Molecular Properties / Structure
Size of a molecule. Or what's in a shape?  Demchik, Michael J.; Demchik, Virginia C.
The authors describe an experiment which helps students understand why oleic acid is essentially insoluble in water.
Demchik, Michael J.; Demchik, Virginia C. J. Chem. Educ. 1971, 48, 770.
Lipids |
Molecular Properties / Structure |
Molecular Modeling |
Physical Properties |
Solutions / Solvents |
Fatty Acids
A simple molecular weight experiment  Kalbus, Lee; Petrucci, Ralph H.
The authors share a method that is conceptually similar to the Dumas method and students have had considerable success.
Kalbus, Lee; Petrucci, Ralph H. J. Chem. Educ. 1971, 48, 107.
Molecular Properties / Structure |
Quantitative Analysis
Polymer models  Carraher, Charles E., Jr.
A child's "pop-it-bead" set or polystyrene spheres or corks with holes drilled through them and connected with a shoestring can be used to illustrate some relationships of structure to polymer properties.
Carraher, Charles E., Jr. J. Chem. Educ. 1970, 47, 581.
Molecular Properties / Structure |
Molecular Modeling |
Polymerization
Avogadro's number from the volume of a monolayer  Moynihan, Cornelius T.; Goldwhite, Harold
This article comments on and makes suggestions regarding the conduct of and treatment of data in the popular experiment in which Avogadro's number is estimated from the volume of a monolayer on a water surface.
Moynihan, Cornelius T.; Goldwhite, Harold J. Chem. Educ. 1969, 46, 779.
Stoichiometry |
Molecular Properties / Structure
Friday experiments  Bissey, Jack E.
Provides data on an unknown gas and asks readers to determine if it is ideal, as well as its molecular weight and chemical formula.
Bissey, Jack E. J. Chem. Educ. 1969, 46, 497.
Gases |
Molecular Properties / Structure
Chemical queries. Especially for introductory chemistry teachers  Young, J. A.; Malik, J. G.
(1) Is there such a thing as a negative pH value? Or one above 14? (2) What is entropy, in terms a beginner may understand? (3) On calculating the molecular weight of a solute from concentration and freezing point depression.
Young, J. A.; Malik, J. G. J. Chem. Educ. 1969, 46, 36.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Thermodynamics |
Molecular Properties / Structure
A simple vacuum apparatus for lecture experiments  Peterson, L. K.; Ruddy, F. H.
Describes a simple vacuum apparatus and examples of its use in lecture situations.
Peterson, L. K.; Ruddy, F. H. J. Chem. Educ. 1968, 45, 742.
Laboratory Equipment / Apparatus |
Gases |
Liquids |
Physical Properties |
Transport Properties |
Stoichiometry |
Calorimetry / Thermochemistry
Application of diophantine equations to problems in chemistry  Crocker, Roger
The mathematical method of diophantine equations is shown to apply to two problems in chemistry: the balancing of chemical equations, and determining the molecular formula of a compound.
Crocker, Roger J. Chem. Educ. 1968, 45, 731.
Mathematics / Symbolic Mathematics |
Stoichiometry
Computer simulation of experimental data  Shwendeman, R. H.
This note describes some of the techniques in programming used to generate a sufficient variety of experimental data to provide each student with his own set of numbers for analysis in conjunction with the demonstration laboratory.
Shwendeman, R. H. J. Chem. Educ. 1968, 45, 665.
Molecular Properties / Structure |
Physical Properties |
Gas Chromatography
Simple construction to determine protein molecular weights by the osmotic pressure method  Candlish, John K.
This short note presents a simple device to determine protein molecular weights through osmotic pressure.
Candlish, John K. J. Chem. Educ. 1968, 45, 93.
Molecular Properties / Structure |
Proteins / Peptides |
Physical Properties
Molecular weights from Dumas bulb experiments  Kaya, Julie J.; Campbell, J. Arthur
Describes an investigation in which students use a Dumas bulb to determine the molecular weight of several substances and presents the accompanying data.
Kaya, Julie J.; Campbell, J. Arthur J. Chem. Educ. 1967, 44, 394.
Molecular Properties / Structure
Improvements in the Victor-Meyer  Bader, Morris
Two improvements in the Victor-Meyer have simplified the apparatus and greatly increased the accuracy of molecular weight determinations.
Bader, Morris J. Chem. Educ. 1966, 43, 500.
Laboratory Equipment / Apparatus |
Molecular Properties / Structure
Minimum molecular weight approach for determining empirical formulas  Harwood, H. James
Describes the determination of empirical formulas from "minimum molecular weight," the molecular weight divided by the number of atoms of an element present in a molecule.
Harwood, H. James J. Chem. Educ. 1965, 42, 222.
Molecular Properties / Structure |
Stoichiometry
The effect of structure on chemical and physical properties of polymers  Price, Charles C.
Suggests using polymers to teach the effect of changes in structure on chemical reactivity, the effect of structure on physical properties, the role of catalysts, and the basic principles of a chain reaction mechanism.
Price, Charles C. J. Chem. Educ. 1965, 42, 13.
Physical Properties |
Molecular Properties / Structure |
Polymerization |
Kinetics |
Reactions |
Catalysis |
Mechanisms of Reactions
Demonstrating the Weissenberg effect with gelatin  Wiegand, James H.
Describes a simple apparatus to demonstrate the Weissenberg effect with gelatin.
Wiegand, James H. J. Chem. Educ. 1963, 40, 475.
Molecular Properties / Structure
Chemical bonding and the geometry of molecules (Ryschkewitsch, George E.)  Eblin, Lawrence P.

Eblin, Lawrence P. J. Chem. Educ. 1963, 40, 441.
Molecular Properties / Structure |
Covalent Bonding
Non-existent compounds  Dasent, W. E.
The purpose of this review is to examine compounds that do not violate the rules of valence but which are nevertheless characterized by a high degree of instability, and to consider why these structures are unstable or non-existent.
Dasent, W. E. J. Chem. Educ. 1963, 40, 130.
Molecular Properties / Structure |
Covalent Bonding
Hypodermic syringes in quantitative elementary chemistry experiments. Part 2. General chemistry experiments  Davenport, Derek A.; Saba, Afif N.
Presents a variety of experiments that make use of hypodermic syringes in quantitative elementary chemistry.
Davenport, Derek A.; Saba, Afif N. J. Chem. Educ. 1962, 39, 617.
Laboratory Equipment / Apparatus |
Gases |
Liquids |
Reactions |
Equilibrium |
Stoichiometry
Moles and equivalents: Quantities of matter  Cohen, Irwin
Examines the various means of describing and measuring quantities of matter, including the mole and the equivalent.
Cohen, Irwin J. Chem. Educ. 1961, 38, 555.
Stoichiometry |
Nomenclature / Units / Symbols
Letters  Foy, John R.
Suggests a modification to an earlier proposed definition for the term mole.
Foy, John R. J. Chem. Educ. 1961, 38, 554.
Stoichiometry |
Nomenclature / Units / Symbols
Letters  Bieber, Theodore I.
Provides a concise definition for the mole.
Bieber, Theodore I. J. Chem. Educ. 1961, 38, 554.
Stoichiometry |
Nomenclature / Units / Symbols
Letters  Cohen, Irwin
Proposes use of the term cardinal weight.
Cohen, Irwin J. Chem. Educ. 1961, 38, 554.
Stoichiometry |
Nomenclature / Units / Symbols
A redefinition of "mole"  Lee, Shiu
Proposes improvements to a set of terms related to gram formula weights.
Lee, Shiu J. Chem. Educ. 1961, 38, 549.
Stoichiometry |
Nomenclature / Units / Symbols
Editorially speaking  Kieffer, William K.
Calls attention to an article in this issue of the Journal on the mole concept.
Kieffer, William K. J. Chem. Educ. 1961, 38, 51.
Stoichiometry
A molality-molarity paradox?  Toby, Sidney
The author points out that there seems no obvious reason why molality could not equal molarity in a solution whose density is less than unity.
Toby, Sidney J. Chem. Educ. 1959, 36, 230.
Stoichiometry |
Nomenclature / Units / Symbols |
Solutions / Solvents |
Aqueous Solution Chemistry
The geometry of giant molecules  Price, Charles C.
The author examines a variety of specific examples of natural and synthetic polymer molecules and describes how their geometric molecular arrangements influence their properties.
Price, Charles C. J. Chem. Educ. 1959, 36, 160.
Molecular Properties / Structure |
Proteins / Peptides |
Carbohydrates
Accurate molecular models  Godfrey, John C.
Describes the construction of molecular models that rely on plastics to represents as accurately as possible all of the physical characteristics of real molecules.
Godfrey, John C. J. Chem. Educ. 1959, 36, 140.
Molecular Modeling |
Molecular Properties / Structure
Molecular weight determination by boiling-point elevation: A freshman research project  Wolthuis, Enno; Visser, Marilyn; Oppenhuizen, Irene
Describes an investigation into factors influencing the results of molecular weight determination by boiling-point elevation and the procedure refined through these efforts.
Wolthuis, Enno; Visser, Marilyn; Oppenhuizen, Irene J. Chem. Educ. 1958, 35, 412.
Physical Properties |
Molecular Properties / Structure |
Undergraduate Research |
Phases / Phase Transitions / Diagrams
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
Estimation of Avogadro's number: An experiment for general chemistry laboratory  King, L. Carroll; Neilsen, E. K.
This procedure involves measuring a film of oleic acid on water.
King, L. Carroll; Neilsen, E. K. J. Chem. Educ. 1958, 35, 198.
Stoichiometry
Textbook errors: XIII. The nature of ionic and molecular species in sulfuric acid  Brubaker, Carl H., Jr.
Addresses misconceptions regarding the strength of sulfuric acid and the nature of ionic and molecular species present in solution.
Brubaker, Carl H., Jr. J. Chem. Educ. 1957, 34, 325.
Molecular Properties / Structure |
Solutions / Solvents |
Aqueous Solution Chemistry
The Grignard reagent reaches the freshman  King, W. Bernard; Beel, John A.
A laboratory procedure that allows students to distinguish between the structure of ethanol and dimethyl ether.
King, W. Bernard; Beel, John A. J. Chem. Educ. 1955, 32, 146.
Grignard Reagents |
Molecular Properties / Structure
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
Molecular weight apparatus for use in general chemistry  Randall, David L.
Some of the difficulties that arise when general chemistry students determine the molecular weight of a volatile liquid are avoided by the use of a specialized glass bulb.
Randall, David L. J. Chem. Educ. 1954, 31, 297.
Laboratory Equipment / Apparatus |
Molecular Properties / Structure
Otis Coe Johnson and redox equations  Bennett, George W.
It is the purpose of this paper to point out what is basic verity and what is empiricism in Johnson's method for balancing oxidation-reduction equations.
Bennett, George W. J. Chem. Educ. 1954, 31, 157.
Oxidation / Reduction |
Oxidation State |
Stoichiometry
Letters to the editor  Standen, Anthony
Helping students to understand the experiment they have done is a difficult task; experiments that claim to "prove" physical laws or determine Avogadro's number compound this problem.
Standen, Anthony J. Chem. Educ. 1954, 31, 46.
Stoichiometry
Effects of molecular shapes  Foster, Laurence S.
A brief discussion of basic molecular shapes and how they help to determine the physical and chemical properties of substances.
Foster, Laurence S. J. Chem. Educ. 1952, 29, 156.
Molecular Properties / Structure
A method of estimating the boiling points of organic liquids  Pearson, D. E.
Discusses the relationship between the molecular structure of organic liquids and their boiling point.
Pearson, D. E. J. Chem. Educ. 1951, 28, 60.
Liquids |
Phases / Phase Transitions / Diagrams |
Physical Properties |
Molecular Properties / Structure