OCC Chem Lab 5.docx - Cailin Winokur Professor Stage...

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Cailin Winokur Professor Stage Chemistry II March 12, 2018 Lab 5: Titration For acetic Acid in Vinegar Objectives: The objective of this experiment is to determine the molarity of a solution and the percent by mass of acetic acid in vinegar by the titration with the NaOH. Procedure: For this experiment, grab a test tube holder and a 2 thick textbooks. Remove the plunger from the titrator, which was from the lab kit and attach the stocktip to the top of the titrator and a plastic cap at the end. This will prevent leakage. With the stopcock in the closed positon, fill the titrator with 9-10mL of the .5M NaOH and remove the beaker away, with a crumbled paper towel the titrator. Clean up the solution and take a dry 100mL beaker under the titrator. Use a graduated cylinder to measure 5mL of vinegar and pour it into the beaker. Cut off the top of the pipet and ass 2 drops of phenolphthalein into the 5mL of vinegar and swirl it around. Record in Data 1. Repeat for three trials and record. Use the given equations to determine the average
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