The acetic acid (HOAC) content of vinegar is determined by titrating with a standard solution of sodium hydroxide to a phenolphthalein end point. (a) A 1 mL pipet carries an uncertainty of 0.02 mL, while a 10 mL pipet has an uncertainty of +0.08 mL. Which one do you prefer in order to transfer 10 mL vinegar sample to a volumetric flask? (b) The sodium hydroxide is standardized by potassium acid phthalate, and five titrations give molarities of 0.2020, 0.2016, 0.2015, 0.2027 and 0.2021 M. Calculate the mean and standard deviation of the standardization. (c) The 10 mL pipet in (a) is used to transfer 10 mL vinegar sample into the volumetric flask. The titration consumes 35.77 mL (+0.02 mL) sodium hydroxide in (b) to reach the end point. Calculate the molarity of acetic acid in the vinegar sample and report the uncertainty. (d) Given that the density of vinegar is 1.05 g/mL and the molar mass of acetic acid is 60.052 g/mol, calculate the content (w/w) of acetic acid. (e) Give a possible source of determinate error in this experiment.