What Is K_a at 25°C for the Following Equilibrium Given $\times$

question 39

Multiple Choice

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

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