What Is the Acid Ionization Constant , K _a, for Hypobromous

Multiple Choice

What is the acid ionization constant , K _a, for Hypobromous acid, if a 0.20 M aqueous solution of Hypobromous acid has a pH equal tO₄.67?

A) K _a = 1.1×10 ^{- 18}
B) K _a = 4.7×10 ^{- 10}
C) K _a = 2.3×10 ^{- 9}
D) K _a = 2.1×10 ^{- 5}
E) K _a = 1.1×10 ^{- 4}