Calculate the PH at the Equivalence Point for the Titration

Multiple Choice

Calculate the pH at the equivalence point for the titration of 0.22 M HCN with 0.22 M NaOH. (K_a = 4.9 * 10^-10 for HCN)

A) 10.58
B) 10.78
C) 10.98
D) 11.18
E) None of the above