C5H5N +H2O <=>HC5H5N+ + OH-
Kb=[HC5H5N+][OH-] / [C5H5N]=1.4*10-9
Let [HC5H5N+]=[OH-]= x, then [C5H5N]=0.145-x
1.4*10-9=x*x/0.145-x;
1.4*10-9*(0.145-x)=x2
x2 +1.4*10^-9*x - 2.03*10^-10=0;
x has no solution
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