Potassium Metal Is Explosive—Do Not Use It!

Andreas Grubelnik and Veronika R. Meyer
EMPA, Swiss Federal Laboratories for Materials Testing and Research, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
Peter Bützer and Urban W. Schönenberger
St. Gallen School for Teacher Education, CH-9000 St. Gallen, Switzerland
J. Chem. Educ., 2008, 85 (5), p 634
DOI: 10.1021/ed085p634.2
Publication Date (Web): May 1, 2008

Abstract

The reaction of sodium with water is a spectacular and essential classroom demonstration. Many teachers want to show also the more violent reaction of potassium. We propose not to do so because explosions can happen even before the metal is in contact with water.

Keywords (Audience):

Elementary / Middle School Science

Keywords (Domain):

Safety / Hazards

Keywords (Feature):

Letters

Keywords (Subject):

Metals

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

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    Readily Made Solvated Electrons

    Jorge G. Ibanez, Francisco J. Guerra-Millan, Muhamad Hugerat, Jorge L. Vazquez-Olavarrieta, Ahmad Basheer, and Riam Abu-Much
    Journal of Chemical Education2011 88 (5), 670-672
    • Readily Made Solvated Electrons

      Jorge G. Ibanez, Francisco J. Guerra-Millan, Muhamad Hugerat, Jorge L. Vazquez-Olavarrieta, Ahmad Basheer, and Riam Abu-Much
      Journal of Chemical Education2011 88 (5), 670-672

      The existence of solvated electrons has been known for a long time. Key methods for their production (i.e., photoionization of reducing ions, water radiolysis, and the reaction between H· and OH−) are unsuitable for most school laboratories. We describe a ...

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History

  • Received: August 03, 2009

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