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If the a mixture of methylamine (CH3NH2, p Kb = 3.32) in water produces a pH of 11.8, what is the initial molar concentrationTriethylamine (C2H5)3N) has a pKb = 3.25. What is the value of the equilibrium constant K for this reaction: (C2H5)3NH(aq) +

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ANSWER : Criven so pH= 11.8 poH= 14-1108 = 2.2. [OH-] = 1022 [51H-] = 6.31 x 103 M Also, pkb = 3.32 Ko= 10 3 32. = 4.79x104.

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