What Is K_a at 25°C for the Following Equilibrium

question 51

Multiple Choice

What is K_a at 25°C for the following equilibrium?
CH₃NH₃⁺(aq) + H₂O(l)
CH₃NH₂(aq) + H₃O⁺(aq)
K_b (CH₃NH₂) = 4.4 × 10^-4 at 25°C.

• A)4.4 × 10^-4
• B)2.3 × 10³
• C)4.4 × 10^-10
• D)4.4 × 10⁴
• E)2.3 × 10^-11

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