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The Dissociation Equilibrium Constants for the Protonated Form of Alanine

Question 97

Multiple Choice

The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid,H2X+) are Ka1 = 4.6 × 10-3 and Ka2 = 2.0 × 10-10.What is the pH of 50.00 mL of a 0.050 M solution of alanine after 37.50 mL of 0.100 M NaOH has been added?


A) 4.85
B) 6.02
C) 7.39
D) 9.70

Correct Answer:

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