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Peer reviewed Peer reviewed
Kolb, Doris, Ed. – Journal of Chemical Education, 1988
Provides two demonstrations: (1) electrolyte migration of ions using colored ions which cross a strip of gelatin allowing for noticeable migration; and (2) photochemical reduction of Fe+3 by the citrate ion. Points out both reactions can be done in a Petri dish using common lab materials. (MVL)
Descriptors: Chemical Equilibrium, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Kolb, Doris, Ed. – Journal of Chemical Education, 1989
Presents two demonstrations using the overhead projector: (1) describes how to build a projecting voltmeter and presents uses for the classroom; and (2) investigates the color of fluorescent solutions by studying the absorption and transmission of light through the solutions. (MVL)
Descriptors: Chemistry, College Science, Electricity, Higher Education
Peer reviewed Peer reviewed
Kolb, Doris, Ed. – Journal of Chemical Education, 1989
Described are three chemistry demonstrations: (1) a simple qualitative technique for taste pattern recognition in structure-activity relationships; (2) a microscale study of gaseous diffusion using bleach, HCl, ammonia, and phenolphthalein; and (3) the rotation of polarized light by stereoisomers of limonene. (MVL)
Descriptors: Chemical Reactions, Chemistry, College Science, Diffusion (Physics)