When 5.00 mL of 0.1032 M NaOH were added to 0.1123 g of alanine (FM 89.093) in

Question:

When 5.00 mL of 0.1032 M NaOH were added to 0.1123 g of alanine (FM 89.093) in 100.0 mL of 0.10 M KNO3, the measured pH was 9.57. Use activity coefficients to find pK2 for alanine. Consider the ionic strength of the solution to be 0.10 M and consider each ionic form of alanine to have an activity coefficient of 0.77.