Chem Lab #4 Report

Chem Lab #4 Report - Lab #4 Report: Determination of Acetic...

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Lab #4 Report: Determination of Acetic Acid in Vinegar using a pH Electrode Sarah Aistrup Sirus Saeedipour Michael Aldrighetti Hasan Naser Sec. 425 Cassie Ward
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INTRODUCTION : The purpose of this lab was to: 1) Determine percent Composition of Acetic Acid in Vinegar. 2) Determine properties of household substances. To determine the properties of apple cider vinegar which is composed of water and a weak acid, Acetic Acid (HC 2 H 3 O 2 ), the titration method was employed. Implementation of this procedure allows for a slow, controlled addition of a base. In this experiment the base, NaOH, was added to the acid, HC 2 H 3 O 2. By supplementing the acidic solution with an universal indicator a permanent color change can occur throughout the new solution when it reaches a pH within the indicators specified range. This experiment used phenolphthalein with a range of 8.0 to 9.2. The permanent change in color results when the mixture reaches its equivalence point, or the point where the amount of the base added is equal to the acid present. At this time the mixture will turn pink, indicating the acid and base have neutralized each other. EXPERIMENTAL:
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Chem Lab #4 Report - Lab #4 Report: Determination of Acetic...

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