A 00678 M Solution of a Weak Base Has a PH

question 38

Multiple Choice

A 0.0678 M solution of a weak base has a pH of 9.44.What is the identity of the weak base?
Weak Base
K_b
Ethylamine (CH₃CH₂NH₂)
4) 7 × 10^-4
Hydrazine (N₂H₄)
1) 7 × 10^-6
Hydroxylamine (NH₂OH)
1) 1 × 10^-8
Pyridine (C₅H₅N)
1) 4 × 10^-9
Aniline (C₆H₅NH₂)
4) 2 × 10^-10

• A)hydrazine
• B)pyridine
• C)ethylamine
• D)hydroxylamine
• E)aniline