Quantitative Technique - Quantitative Technique Prepared...

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Quantitative Technique Prepared by: Caroline Lu School of Pharmacy and Pharmaceutical Sciences Purdue University West Lafayette, IN 47906-1393 September 7, 2008 ABSTRACT
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This report describes the standardization of a sodium hydroxide solution by titration against a known concentration of Potassium Hydrogen Phthalate, or KHP, and subsequently using this sodium hydroxide to determine the concentration of an unknown acid. The titration was mechanized using a burette. Endpoints were determined by detecting color change due to excess NaOH reacting with the trace amounts of phenolphthalein indicator in the acid. Four titrations of a fixed amount of KHP yielded a mean end-point volume of 5.77 mL with a standard deviation of 0.077 mL ((RSD = 1.3 %). The mean value (N = 3) of the sodium hydroxide concentration was determined to be 0.0863 M with a 95 % confidence interval of ± 0.00263 M. The mean value of the unknown concentration was determined to be with a 95% confidence interval of ± INTRODUCTION
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This note was uploaded on 02/23/2012 for the course CHM 321 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Quantitative Technique - Quantitative Technique Prepared...

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