A 25.0 mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution. What is the pH at the equivalence point? The Ka of hydrazoic acid is 1.9 ⋅ 10-5. A 25.0 mL sample of 0.150 M hydrazoic acid is titrated with a 0.150 M NaOH solution. What is the pH at the equivalence point? The Ka of hydrazoic acid is 1.9 10-5.

(A) 8.80
(B) 7.00
(C) 11.72
(D) 4.72
(E) 9.28