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CHEM 1&2 Lab Manual & worksheets pg 162

CHEM 1&2 Lab Manual & worksheets pg 162 -...

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Experiment 15: Titration of Vinegar General Chemistry I and II Lab Manual Dakota State University page 162 of 232 Experiment 15: Titration of Vinegar Purpose: To determine the concentration of acetic acid in vinegar Purrrr-fect: Something Cat-woman used to say just before doing something villainous Background: See “Using the Pasco System” and “Basic Laboratory Procedures”; pipettes, burets, balance Introduction: Commercial vinegar is typically about 5% acetic acid (CH 3 COOH). This is a classic titration in which we will determine the exact concentration of acetic acid in store- bought vinegar. Procedure: You will want to set up the Pasco system for manual data collection using the pH probe. You will want to have it plot pH as a function of volume of base added. Set up a buret (see general procedures) for a titration. Standardization of the Base: Follow this procedure IF the base solution provided has not already been standardized. If the base has been standardized for you, write down the exact concentration (four significant digits) of the base and proceed to titration of the acid.
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