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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 16
(2011) pp 129-131
On the Oxygen Content of Air: An Alternative Determination Using Digital Manometer
Vladimir M. Petruševski* and Nataša Stavrevska
Institute of Chemistry, Faculty of Natural Sciences
and Mathematics, Ss Cyril and Methodius University, Arhimedova 5, PO
Box 162, 1000
Skopje, Republic of Macedonia, vladop@pmf.ukim.mk
Received January 12, 2011. Accepted
March 1, 2011.
Published: 26 May 2011
Abstract. In order to determine the oxygen content in the air, an excess of alkaline solution of pyrogallol was placed in a reaction chamber connected to a digital manometer. The reaction is completed in less than 24 hours, the determined oxygen content is in perfect agreement with the widely adopted value of 21 % by volume. Also the process follows, almost ideally, a first order kinetics.
Key Words: Laboratories and Demonstrations; general chemistry
(*) Corresponding author. (E-mail: vladop@pmf.ukim.mk)
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