A 20.0mL sample of 0.50 M H2C6H6O6 ascorbic acid, a diprotic acid was titrated with .50 M NaOH. The subsequent data were gathered during the titration. Explain what is Ka2 for ascorbic acid?
mL NaOH added and Corresponding pH:
10.00 mL, pH of 4.17
20.00 mL, pH of 5.21
30.00 mL, pH of 11.55
40.00 mL, pH of 12.89