4. Explain why it is quantitatively not acceptable to titrate each of the vinegar samples with the NaOH titrant to the same dark pink endpoint. aleylonA 1ogeni 5. a. A commercial vinegar is analyzed for the percent acetic acid present. The data for Trial I is listed in the table below. Complete the table to determine the percent. (See Report Sheet.) Record calculated values with the correct number of significant figures. A. Preparation of Vinegar Sample 1. Mass of vinegar (g) Calculation Zone 3.06 Part B.5 B. Analysis of Vinegar Sample 1. Buret reading, initial (mL) 2. Buret reading, final (mL) 3. Volume of NaOH used (mL) 4. Molar concentration of NaOH solution (mol/L) 5. Moles of NaOH added (mol) Show calculation. 6. Moles of CH,COOH in vinegar (mol) Show calculation. 7. Mass of CH,COOH in vinegar (g) Show calculation. 8. Percent by mass of CH,COOH in vinegar (%) Show calculation. 3.70 25.40 Part B.6 0.0940 Part B.7 Part B.8 5. b. For Trials 2 and 3, the percent CH,COOH in vinegar was 5.01% and 4.66% respectively. a. What is the average percent of CH,COOH in the vinegar sample? Data Analysis, B. b. What are the standard deviation and the relative standard deviation (%RSD) for the percent of CH,COOH in the vinegar sample? Data Analysis, C and D.