The German company Surig sells Essigessenz, which is reported to be 30% acetic acid by mass vinegar. You are asked to test a sample to determine if, in fact, it is 30% acetic acid by mass. You weigh out a 10.00mL sample of the vinegar and find it has a mass of 10.261g. You then add 20mL of water and a drop of phenolphthalein to the sample. You prepare a buret with 1.145M NaOH solution. It has an initial volume of 1.31mL. The vinegar sample is titrated to the phenolphthalein endpoint. The final volume on the buret is 47.59mL. What is the percent by mass acetic acid in the vinegar sample? Report your answer to 4 significant figures. Your Answer:

The German company Surig sells Essigessenz, which is reported to be 30% acetic acid by mass vinegar. You are asked to test a sample to determine if, in fact, it is 30% acetic acid by mass. You weigh out a 10.00mL sample of the vinegar and find it has a mass of 10.261g. You then add 20mL of water and a drop of phenolphthalein to the sample. You prepare a buret with 1.145M NaOH solution. It has an initial volume of 1.31mL. The vinegar sample is titrated to the phenolphthalein endpoint. The final volume on the buret is 47.59mL. What is the percent by mass acetic acid in the vinegar sample? Report your answer to 4 significant figures. Your Answer:

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter4: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 20Q: A student wants to prepare 1.00 L of a 1.00-M solution of NaOH (molar mass = 40.00 g/mol). If solid...

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