Problem: Given that Kb for (CH3)3N is 6.3 × 10-5 at 25 °C, what is the value of Ka for (CH3)3NH at 25 °C?

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 (CH3)3NH     +     H2O      ⇌      (CH3)3NH+     +     OH-
        (weak base)                                 (acid)                                (conjugate acid)                    (conjugate base) 


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Given that Kb for (CH3)3N is 6.3 × 10-5 at 25 °C, what is the value of Ka for (CH3)3NH at 25 °C?

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