Designing a Self-Contained Qualitative Analysis Test for Transition Metal Ions

• Y. S. Serena Tan ^[1] ; B. H. Iain Tan ^[1] ; Hian Kee Lee ^[1] ; Yaw Kai Yan ^[1] ; T. S. Andy Hor ^[1]
  1. [1] National University of Singapore

     National University of Singapore

     Singapur

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 75, Nº 4 (April), 1998, págs. 456-458
• Idioma: inglés
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• Resumen

  • A challenging self-contained qualitative analysis test for transition metal compounds comprising nine unknowns was designed whereby the unknown solutions can be systematically identified, without relying on external reagents, by inter-mixing the unknown samples. The names of the samples are made known, but their correspondence with the samples is concealed. A representative range of transition metal compounds was selected, together with two complementary main-group compounds. This "9-bottle" test encourages logical deduction and analytical thinking and cannot be negotiated by pure regurgitation of memorized facts. It is also more environment-friendly as it avoids the use of any external reagents, thereby reducing waste and circumventing the disposal problems.