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The pH of a 0.170 mM solution of the alkaloid quinine is 9.25. Determine Kb for...

The pH of a 0.170 mM solution of the alkaloid quinine is 9.25. Determine Kb for quinine from these data. (Assume Kw = 1.01 ✕ 10−14.)
C20H24N2O2(aq) + H2O(l) equilibrium reaction arrow HC20H24N2O2+(aq) + OH −(aq)

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