At 25 ^$\circ$ C, the Base Ionization Constant for NH₃ Is 1

Multiple Choice

At 25 ^$\circ$ C, the base ionization constant for NH₃ is 1.8 * 10^-5. Determine the percentage ionization of a 0.150 M solution of ammonia at 25 ^$\circ$ C.

A) 0.2%
B) 0.9%
C) 1.1%
D) 2.5%
E) None of the above