The equilibrium constant for bromothymol blue

A general chemistry laboratory experiment using spectroscopy

Elsbeth Klotz, Robert Doyle, Erin M. Gross, Bruce M. Mattson

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A simple, inexpensive, and environmentally friendly undergraduate laboratory experiment is described in which students use visible spectroscopy to determine a numerical value for an equilibrium constant, Kc. The experiment correlates well with the lecture topic of equilibrium even though the subject of the study is an acid-base indicator, bromothymol blue. The experiment gives excellent results and offers an inexpensive, zero-waste alternative to traditional equilibrium experiments, such as the Fe(SCN) 2+ equilibrium.

Original languageEnglish
Pages (from-to)637-639
Number of pages3
JournalJournal of Chemical Education
Volume88
Issue number5
DOIs
StatePublished - May 1 2011

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Bromthymol Blue
Equilibrium constants
laboratory experiment
chemistry
Spectroscopy
experiment
Experiments
Students
Acids
student

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Education

Cite this

The equilibrium constant for bromothymol blue : A general chemistry laboratory experiment using spectroscopy. / Klotz, Elsbeth; Doyle, Robert; Gross, Erin M.; Mattson, Bruce M.

In: Journal of Chemical Education, Vol. 88, No. 5, 01.05.2011, p. 637-639.

Research output: Contribution to journalArticle

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