Standardization of Base and Determination of Acetic Acid Content in Vinegar
...or to the acid sample. Record the exact mass of the vinegar. pzwntf1y Visit studentcentral ba co ba uk ba for more ba Do not ba redistribute pzwntf1y Placed sodium hydroxide solution in a clean dry beaker and labelled it. Obtained a burette, burette clamp, meniscus reader, and a pH meter. Emptied distilled water from burette and rinsed with a few milliliters of base. Repeated rinsing two or three times and then completely filled the burette. Eliminated any air bubbles in the tip of the burette. Used the meniscus reader to read the volume to the nearest 2 decimal places. Recorded the initial volume. Placed the indicator into the beaker. Keeping the resulting solution well stirred throughout the following titration. Started the titration by adding the acid in increasing of 0.5 mL. When the solution started to turn pink, I recorded this volume of strong acid as the endpoint and calculated the volume used in the reaction. And then I repeated steps 2, 3, 6 and 7 at two more times. Conclusion: We learned in our lab how to find the approximate endpoint of an acid-base solution and what the endpoint signified. In the trial using the strong acid, the titration curve started its dramatic incline at about 26 mL of NaOH. The weak acid titration curve began to rapidly increase at approximately 35 mL of NaOH. The endpoint signifies the place at which just enough b...