Hypobromous Acid,HOBr,has an Acid Dissociation Constant of 2 $\times$ 10^-9 at 25°C

Multiple Choice

Hypobromous acid,HOBr,has an acid dissociation constant of 2.5 $\times$ 10^-9 at 25°C.What is the pOH of a 0.075 M HOBr solution?

A) 2.80
B) 4.27
C) 4.86
D) 9.14
E) 11.20