Lab analysis of vinegar.docx

Lab analysis of vinegar.docx - Lab Analysis of Vinegar...

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Lab: Analysis of Vinegar Purpose: The purpose of this experiment was to determine the percentage of acetic acid in vinegar. Experimental Method Equipment: 125 mL Erlenmeyer Flasks, burets, buret stand and clamp Chemicals: Phenolphthalein Indicator, Vinegar The vinegar sample was titrated with standardized sodium hydroxide solution (1.0M NaOH). A measured sample of vinegar was placed under a buret. The buret was filled with the standardized NaOH solution. A chemical indicator, phenophthalein, was added to the vinegar solution to allow the endpoint of the neutralization to be detected. The initial volume of the buret was read and recorded before beginning the titration. The titration was performed drop-by-drop until the indicator changed color to pink. At the endpoint, the final volume of NaOH solution was read and recorded. Using the volume and molarity of NaOH, and the volume and density of vinegar, the percentage of acetic acid in the sample was calculated.
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  • Spring '11
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