Phosphorus Flamethrower: A Demonstration Using Red and White Allotropes of Phosphorus

A demonstration was created to display the unique behavior of a familiar element, phosphorus, and to make chemistry more accessible to the introductory student. The common allotropes of phosphorus and their reactivity are discussed. In this demonstration, the white allotrope of phosphorus is synthes...

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Bibliographic Details
Published in:Journal of chemical education 2010-11, Vol.87 (11), p.1154-1158
Main Authors: Golden, Melissa L, Person, Eric C, Bejar, Miriam, Golden, Donnie R, Powell, Jonathan M
Format: Article
Language:English
Subjects:
Allotropy
Chemical elements
Chemical reactions
Chemical synthesis
Chemistry
Demonstrations (Educational)
Hazard identification
Identification methods
Incineration
Organic chemistry
Oxides
Phosphoric acid
Phosphorus
Phosphorus oxides
Science Experiments
Science Instruction
Scientific Principles
Teaching Methods
Tested Demo
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Summary:A demonstration was created to display the unique behavior of a familiar element, phosphorus, and to make chemistry more accessible to the introductory student. The common allotropes of phosphorus and their reactivity are discussed. In this demonstration, the white allotrope of phosphorus is synthesized from the red phosphorus obtained from a matchbook. White phosphorus is exposed to oxygen in the air, and an eye-catching flame is produced. This simple, effective, and dramatic demonstration shows the conversion between red and white allotropes of phosphorus, its reaction with oxygen to form phosphorus oxides, and hydrolysis to form phosphoric acid. Care has been taken to minimize the hazards of burning white phosphorus and to identify proper methods of disposal.
ISSN:0021-9584
1938-1328
DOI:10.1021/ed1002652