exp15_prelab

exp15_prelab - Experiment 14: Standardization of a Sodium...

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Experiment 14: Standardization of a Sodium Hydroxide Solution
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Learning Objectives z To use a titration to determine the concentration of a solution of unknown concentration z To learn about acid-base reactions and their stoichoimetry z To practice quantitative precision in the laboratory
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What Is a Titration? z Common method for determining the concentration of a solution z In a titration, the titrant is reacted with a solution of an unknown concentration in a controlled manner z A titrant is a solution of known concentration z Add the titrant in many small, known volume increments z At the equivalence point, enough titrant has been added to react exactly with the substance being investigated
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More on Titrations z The reaction is followed using a method such as a pH dependent colorimetric indicator, a pH electrode, a conductivity sensor, reaction temperature, etc. z If using a colorimetric indicator, the end point occurs when the color of the solution changes z Ideally the end point of the indicator is at the equivalence point of the titration
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exp15_prelab - Experiment 14: Standardization of a Sodium...

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