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Phenolphthalein—Pink Tornado DemonstrationBruce R. Prall This demonstration uses the vortex generated by a spinning magnetic stir bar to demonstrate Le Châtelier's principle as it applies to the phenolphthalein equilibrium in water and provides an excellent opportunity to discuss limiting and excess reagents. Prall, Bruce R. J. Chem. Educ.2008, 85, 527.
Acids / Bases |
Equilibrium |
Kinetics |
pH
Chemical Speciation and Calculation of pH of a Sport DrinkJosé L. Guiñón Segura A recently published laboratory procedure allows students to see that the pointer function has a minimum value at the solution pH. However, the resolution of the pointer function requires the plotting the logarithmic concentration diagram, which is time-consuming and tedious. Segura, José L Guiñón. J. Chem. Educ.2008, 85, 371.
Acids / Bases |
Aqueous Solution Chemistry |
Consumer Chemistry |
Food Science |
Mathematics / Symbolic Mathematics |
pH |
Quantitative Analysis
Scientific–Chemical Viewpoints Regarding Smoking: A Science Laboratory for AllRon Blonder This article describes a lab that examines the acidity of cigarette smoke as well as solid particles and vapor phase substances found therein, and simulates the effects of smoking on the lungs. The aim of this activity is to expose adolescents to the scientific aspects of smoking and the relevance of chemistry in everyday life. Blonder, Ron. J. Chem. Educ.2008, 85, 248.
