The Equilibrium Constant for Bromothymol Blue: A General Chemistry Laboratory Experiment Using Spectroscopy

被引：42

作者：

Klotz, Elsbeth ^{[1
]}

Doyle, Robert ^{[1
]}

Gross, Erin ^{[1
]}

Mattson, Bruce ^{[1
]}

机构：

[1] Creighton Univ, Dept Chem, Omaha, NE 68178 USA

来源：

JOURNAL OF CHEMICAL EDUCATION | 2011年 / 88卷 / 05期

关键词：

First-Year Undergraduate/General; Laboratory Instruction; Hands-On Learning / Manipulatives; Acids/Bases; Equilibrium; Green Chemistry; Physical Chemistry; Dyes/Pigments; UV-Vis Spectroscopy;

D O I：

10.1021/ed1007102

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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, K-c. 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.

引用

页码：637 / 639

页数：3

共 15 条

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[2]

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[4]

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