Which of the Following Aqueous Solutions Will Have the Highest

Multiple Choice

Which of the following aqueous solutions will have the highest pH? For NH₃, K_b = 1.8  10^-5; for C₂H₃O₂^-, K_b = 5.6  10^-10.

A) 2.0 M NH₃
B) 2.0 M HCl
C) 2.0 M NaOH
D) 2.0 M HC₂H₃O₂
E) All these solutions will have the same pH.