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http://dx.doi.org/10.5012/jkcs.2004.48.2.189

An Analysis and Improvement of the Experiment of the Acid-Base Neutralization Reaction  

Jeon, Yeong-Hwa (Department of Chemistry Education, Korea National University of Education)
Hong, Lan-Sun (Department of Chemistry Education, Korea National University of Education)
Kang, Young-Jin (Department of Chemistry Education, Korea National University of Education)
Kang, Seong-Joo (Department of Chemistry Education, Korea National University of Education)
Publication Information
Journal of the Korean Chemical Society / v.48, no.2, 2004 , pp. 189-194 More about this Journal
Abstract
The aim of this study is to analyze and improve the experiment of the acid-base neutralization reaction described in science textbooks. The problems in the neutralization reaction of NaOH-HCl solution were following; 1) the decoloration of phenolphthalein solution, 2) the color change of the titrated solution during condensation for the confirmation of the salt crystals, 3) the difficulty for the confirmation of the salt crystals. These problems are explained by the structure change of phenolphthalein and the improved experiment is proposed.
Keywords
Neutralization reaction; Phenolphthalein; Indicator;
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