| Journal Articles: 11 results |
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Freezing Point of Milk: A Natural Way To Understand Colligative Properties Mercedes Novo, Belén Reija, and Wajih Al-Soufi
Presents a laboratory experiment that illustrates the use of freezing point measurements to control milk quality and determine molecular weight.
Novo, Mercedes; Reija, Belén; Al-Soufi, Wajih. J. Chem. Educ. 2007, 84, 1673.
Consumer Chemistry |
Food Science |
Natural Products |
Phases / Phase Transitions / Diagrams |
Solutions / Solvents
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Introduction of Differential Scanning Calorimetry in a General Chemistry Laboratory Course: Determination of Molar Mass by Freezing Point Depression Ronald P. D'Amelia, Thomas Franks, and William F. Nirode
The work described herein uses differential scanning calorimetry to determine the molar mass of three unknowns (nonvolatile organic hydrocarbons) by freezing point depression.
D'Amelia, Ronald P.; Franks, Thomas; Nirode, William F. J. Chem. Educ. 2006, 83, 1537.
Calorimetry / Thermochemistry |
Instrumental Methods |
Thermal Analysis |
Solutions / Solvents
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A Greener Approach for Measuring Colligative Properties Sean M. McCarthy and Scott W. Gordon-Wylie
As a first step towards the greening of instructional laboratories, we present a new greener version of a laboratory procedure designed to measure colligative properties. The greener procedure substitutes the nontoxic, noncarcinogenic compounds stearic, myristic, lauric, and palmitic acids for the less benign aromatic compounds p-dichlorobenzene, benzil, biphenyl, naphthalene, and nitrotoluene. Achieving educational goals without the concomitant generation of chlorinated and aromatic wastes is shown here to be both possible and practical.
McCarthy, Sean M.; Gordon-Wylie, Scott W. J. Chem. Educ. 2005, 82, 116.
Green Chemistry |
Solutions / Solvents |
Fatty Acids
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An After-Dinner Trick JCE Editorial Staff
Using freezing-point depression to lift an ice cube out of a glass of water with a thread.
JCE Editorial Staff. J. Chem. Educ. 2002, 79, 480A.
Aqueous Solution Chemistry |
Consumer Chemistry |
Phases / Phase Transitions / Diagrams
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On the Importance of Ideality Rubin Battino, Scott E. Wood, and Arthur G. Williamson
Analysis of the utility of ideality in gaseous phenomena, solutions, and the thermodynamic concept of reversibility.
Battino, Rubin; Wood, Scott E.; Williamson, Arthur G. J. Chem. Educ. 2001, 78, 1364.
Thermodynamics |
Gases |
Solutions / Solvents
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Home-Study Microlabs Dietmar Kennepohl
This article presents the use of microscaled chemistry experiments for individual home study and how it can be incorporated into a course with traditional laboratory work.
Kennepohl, Dietmar. J. Chem. Educ. 1996, 73, 938.
Microscale Lab |
Solutions / Solvents |
Calorimetry / Thermochemistry |
Qualitative Analysis |
Precipitation / Solubility
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Soda Water, Supercooling or Freezing Point Depression? Brooker, Murray H.
Composition, preparation, properties, and behavior of soda water.
Brooker, Murray H. J. Chem. Educ. 1994, 71, 903.
Gases |
Water / Water Chemistry |
Precipitation / Solubility |
Solutions / Solvents |
Consumer Chemistry
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Density of antifreeze-water mixtures: A general chemistry experiment in compositional analysis Flowers, Paul A.
Determining the composition of an antifreeze/water solution through density measurements.
Flowers, Paul A. J. Chem. Educ. 1990, 67, 1068.
Physical Properties |
Solutions / Solvents |
Quantitative Analysis
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Molecular size and Raoult's Law Kovac, Jeffrey
An additional cause for deviations from Raoult's Law that is rarely, if ever, mentioned in freshman chemistry texts.
Kovac, Jeffrey J. Chem. Educ. 1985, 62, 1090.
Molecular Properties / Structure |
Physical Properties |
Solutions / Solvents |
Gases
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Quality levels and the Brønsted theory Bank, Evelyn
Maintaining standards for a diversity of students and teaching hydrolysis with the Bronsted-Lowry theory. [Debut]
Bank, Evelyn J. Chem. Educ. 1977, 54, 548.
Acids / Bases |
Aqueous Solution Chemistry |
Brønsted-Lowry Acids / Bases
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Chemical queries. Especially for introductory chemistry teachers Young, J. A.; Malik, J. G.; Strong, Laurence E.
(1) What evidence, understandable and acceptable to students, do most teachers cite to describe the transfer of charge from one electrode to another in the direct current electrolysis of an electrolyte solution? (2) What is a compound? - answer by Strong. (3) What is a molecule? - answer by Strong.
Young, J. A.; Malik, J. G.; Strong, Laurence E. J. Chem. Educ. 1970, 47, 523.
Electrochemistry |
Aqueous Solution Chemistry |
Stoichiometry |
Molecular Properties / Structure
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