Question

A. The manufacturer of the vinegar used in the experiment stated that the vinegar contained 5.0% acetic acid. What is the percent error between your result and the manufacturer’s statement? B. What challenges would you encounter with the titration if you had used apple cider vinegar or balsamic vinegar as the analyte instead of white vinegar? The issue with using a dark color vinegar is the coloring in the end. C. How would your results have differed if the tip of the titrator was not filled with NaOH before the initial volume reading was recorded? Explain your answer. D. How would your results have differed if you had over-titrated (added drops of NaOH to the analyte beyond the stoichiometric equivalence point)? The result would have been a higher acetic acid concentration. E. If a 7.0 mL sample of vinegar was titrated to the stoichiometric equivalence point with 7.5 mL of 1.5M NaOH, what is the mass percent of CH3COOH in the vinegar sample? F. Why is it important to do multiple trials of a titration, instead of only one trial? trial 1 initial NaoH- 8 final NaOH- .4 total volume - 7.6

trial 2 initial NaoH- 9 final NaOH- .8 total volume - 8.2

trial 3 initial NaoH- 9 final NaOH- .8 total volume - 8.2

Concentration of CH3COOH in vinegar Average volume of NaOH- 8.6

Concentration of CH3COOH in vinegar- 83 % CH3COOH in vinegar 78%

Answer 1