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The percentage of pyridine (C(5)H(5)N) t...

The percentage of pyridine `(C_(5)H_(5)N)` that forms pyridinium ion `(C_(5)H_(5)N^(+)H)` in a 0.10 M aqueous pyridine solution (`K_(b)` for `C_(5)H_(5)N=1.7xx10^(-9)`) is

A

`1.6 `%

B

`0.0060` %

C

`0.013`%

D

`0.77` %

Text Solution

Verified by Experts

The correct Answer is:
C
`C_(5)H_(5)N +H_(2)O hArr 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)`
` % alpha = 1.3 xx 10^(-4) xx 100 = 1.3 xx 10^(-2) = 0.013`
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