Lab 14: Titration
Lab Setup (Photo) Analyte at the Equivalence Point (Photo) Summary of Procedure Setup: We filled a burette with sodium hydroxide, a strong base, and carefully controlled its flow into an Erlenmeyer flask that was being stirred by a magnetic stir bar. This flask contained a mixture of 20 mL of water, about 7.5 mL of vinegar ( a weak acid), and several drops of the indicator phenolphthalein. We watched the impact the flow of base had on the solution in the flask, watching for the tell-tale flash of pink; we were supposed to turn the liquid a soft pink color. In this lab we performed two trials . On our first trial we added a few drops too many, causing the liquid to turn a shade of hot pink. Our second trial yielded slightly better results; after following the same steps, we cautiously dripped in the base, watching to see how long the pink color lingered after each drop. This time the color produced was not as brigh
