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Nicotine, C10H14N2, is a weak base and has a Kb of 1.0 x 10-6. What is the pH of a 0.20 M solution of nicotine? For full credit, write out the reaction (C10H14N2 (aq) + H2O(l)  …), write out the I.C.E. table beneath it, write the equilibrium constant expression in terms of x, and solve, checking any assumptions (Since it is a basic solution, your pH should be >7).