This experiment effectively demonstrated the basics of acid/base chemistry and the importance of accuracy and precision to students. Since the titration was completed using readily available household equipment, the precision of each student in measuring volumes was paramount as each household instrument was limited in its accuracy. 𝑥 100 (7) Using the average endpoint, the concentration of acetic acid in the Whole Foods vinegar solution was determined to be 1.24M, which results in a percent error of 19%. Thus, the calculated acidity is 19% higher in the Whole Foods vinegar solution than is advertised. This elevated concentration of acetic acid might be the result of acidic impurities present in the white vinegar solution.