TYPE 1 (base)( only B is put into solution )For a weak base (B) in water:B + H2O ⇌OH-+ BH+Kb=[OH±][BH+][B]and let CBbe the analytical concentration (label) of the weak baseOur Equilibrium "ICE" Table[B][OH-][BH+]initialCB00change– x+ x+ xequilibriumCB– xxxKb=x2CB±x()Equation 1.1KbCB±Kb(x)=x20=x2+Kb(x)±KbCB[OH±]=[BH+]=x=±Kb+Kb2+4KbCB2This equation is the exactsolution for calculating the [OH-] for any solution made by mixing a concentration of ONLY a weak base in water. (What I have designated a "Type 1" problem)If we are using a REASONABLE concentration for B ( somewhere between 1.0 M and 0.05 M) AND
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This note was uploaded on 11/02/2008 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.