The percentage of pyridine (C_(5)H_(5)O) that forms pyridinium ion (C_(5)H_(5) overset(+)NH)in a 0.10 M aqueons pyridine solution is (K_(b) for C_(5)H_(5)N=1.7 xx 10^(-9))

The percentage of pyridine (C_(5)H_(5)O) that forms pyridinium ion (C_

1.	The percentage of pyridine (C_(5)H_(5)O) that forms pyridinium ion (C_(5)H_(5) overset(+)NH)in a 0.10 M aqueons pyridine solution is (K_(b) for C_(5)H_(5)N=1.7 xx 10^(-9))
Answer» 0.0077 0.016 6.0E-5 0.00013 Solution :Pyridine is a weak base. In AQUEOUS solution, it ionizes as `{:(,C_(5)H_(5)N+H_(2)O hArr C_(5)H_(5)overset(+)NH+OH^(-)),("Initial conc."," "c "" 0 ""0),("At. eqm." ,C(1-alpha)"" calpha ""calpha),(,K_(b) ~=C alpha^(2) ""("By Ostwald's DILUTION law")):}` `alpha = SQRT((K_(b))/(C))=sqrt((1.7xx10^(-9))/(01))=sqrt(1.7xx10^(-8))=13.10^(-4)` `: .` % disssociation (i.e. , % that forms `C_(5)H_(5)overset(+)NH` ion) `=1.3xx10^(-4)xx100=0.013 %`