Procedure: Place 25 mL sample of vinegar, which contains acetic acid, CH3COOH, in a 250 mL Erlenmeyer flask. Then add 3-5 drops of phenolphthalein solution in the vinegar inside the flask. In the base burette, place 0.4600 M NaOH up to the zero mark. Slowly add the NaOH solution from the burette to the vinegar in the flask, with constant but careful swirling of the content of the flask upon each addition of NaOH. Continue the dropwise addition of NaOH from the burette until the color of the solution in the flask changes to a very pale pink, which indicates the end of titration. Make sure that the burette does not touch the flask or its content. Do the same procedure for two more samples of vinegar. LABORATORY REPORT DATA AND RESULTS Volume of vinegar used Concentration of NaOH Brand of vinegar: Maasim Ito! Trial 1 Trial 2 Trial 3 Initial reading, NaOH burette 00.00 mL 00.00 mL 00.00 mL Final reading, NaOH burette 23.00 mL 22.90 mL 23.10 mL Actual volume of NaOH used Average volume of NaOH used for 3 trials Calculate the % w/v of acetic acid in the sample of vinegar. Show all your calculations. % acetic acid wv=mass in grams of acetic acidvolume of vinegar in mLx 100

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Procedure:

Place 25 mL sample of vinegar, which contains acetic acid, CH3COOH, in a 250 mL Erlenmeyer flask. Then add 3-5 drops of phenolphthalein solution in the vinegar inside the flask.
In the base burette, place 0.4600 M NaOH up to the zero mark.
Slowly add the NaOH solution from the burette to the vinegar in the flask, with constant but careful swirling of the content of the flask upon each addition of NaOH.
Continue the dropwise addition of NaOH from the burette until the color of the solution in the flask changes to a very pale pink, which indicates the end of titration.
Make sure that the burette does not touch the flask or its content.
Do the same procedure for two more samples of vinegar.

LABORATORY REPORT
DATA AND RESULTS
Volume of vinegar used __________
Concentration of NaOH __________
Brand of vinegar: Maasim Ito!
	Trial 1	Trial 2	Trial 3
Initial reading, NaOH burette	00.00 mL	00.00 mL	00.00 mL
Final reading, NaOH burette	23.00 mL	22.90 mL	23.10 mL
Actual volume of NaOH used
Average volume of NaOH used for 3 trials	________

Calculate the % w/v of acetic acid in the sample of vinegar. Show all your calculations. % acetic acid wv=mass in grams of acetic acidvolume of vinegar in mLx 100

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