Prelaboratory assignment Exp. 7 Determining K Name: Date: Lab Section: 5. Data in the following table...
Prelaboratory assignment Exp. 7 Determining K Name: Date: Lab Section: 5. Data in the following table were obtained for the titration of a 0.297-8 sample of a solid, onoprotic weak acid with a 0.150 M KOH solution. Plot pH (ordinate) versus VKOH (abscissa) Vkohadded (mL) pl 0.00 2.00 4.00 7.00 10.00 12.00 14.00 16.00 17.00 18.00 20.00 25.00 1.96 2.22 2.46 2.77 3.06 3.29 3.60 4.26 11.08 11.67 12.05 12.40 a. What volume of the KOH solution is required to reach the stoichiometric point? b. What is the pH at the stoichiometric point? c. What is the pKa of the weak acid? d. Calculate the number of moles of weak acid analyzed.