The acid dissociation constant for boric acid, H3BO3, is 5.8 × 10-10. Calculate the dissociation constant, Kb, for the borate ion (BO33-).

A5.8 x 10^-10
B1.7 x 10^-5
C1.1 x 10^-4

D.2.7 x 10^-3