Concentration of Acetic Acid in Household Vinegar Kit

Addresses AP® Chemistry Big Idea 6 and Learning Objective 6.13. This laboratory exercise combines the traditional skills of titration to determine acid concentration with insightful use of the Henderson-Hasselbalch equation to determine pKa. It can be taught using either a guided or an inquiry activity. In the guided activity, students titrate the acetic acid in vinegar and use their titration data to determine the acid's concentration and pKa. For 30 students in groups of 3.