1.

The percentage of pyridine (C_(2)H_(5)N) that forms pyridinium ion (C_(2)H_(5)N^(+)H) in a 0.10 M aqueous pyridine solution (K_(b) for C_(2)H_(5)N = 1.7 xx 10^(-9)) is

Answer»

`1.6%`
`0.0060%`
`0.013%`
`0.77%`

Solution :`C_(5)H_(5)N + H_(2)O = C_(5)H_(5)N^(+)H + OH^(-)`
0.1
`alpha = SQRT((K_(b))/(c)) = sqrt((1.7 xx 10^(-9))/(0.1)) = sqrt(1.7 xx 10^(-8)) = 1.3 xx 10^(-4)`
`% prop = 1.3 xx 10^(-4) xx 100`
`= 1.3 xx 10^(-2) = 0.013`.


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