Using Chemistry and Color To Analyze Household Products:: A 10-12 Hour Laboratory Project at the General Chemistry Level

• Wayne B. Bosma ^[1]
  1. [1] Bradley University

     Bradley University

     Township of Peoria City, Estados Unidos

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 75, Nº 2 (February), 1998, págs. 214-215
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A general chemistry experiment is described in which the students use UV/Visible spectrometry as an analytical tool, for both compound identification and pH measurement. In the first portion of the experiment, the students compare spectra to determine which FD and C dyes are contained in household products. They furthermore use chromatography to separate the dyes in grape Kool-Aid, and analyze the products with the spectrometer. In the second portion of the experiment, the students use Beer's Law to determine the pH of solutions containing an acid/base indicator. The experiments are visually stimulating and provide a solid introduction to spectroscopy and perceived color.