Nicotine is responsible for the addictive properties of tobacco. Assume Kb1=1.0106I nd Kb2=1.31011, Determine the pH of a 1.20103M solution of nicotine. Hint: You can represent nicotine as B when writing your chemical reactions. So for the first proton ( Kb ) gained by the nicotine (a base) you can write: B(aq)+H2O(I)BH+(aq)+OH(aq)