Answer:
[C₅H₅N] = 1.34 X 10⁻⁵M
Explanation:
C₅H₅N(aq) having a pH of 9.17 would also have a pOH of 14 - 9.17 = 4.83.
Since Nitrogen derivatives form hydroxides in water then
C₅H₅N + H₂O => C₅H₅N:HOH => C₅H₆OH⁻ <=> C₅H₆⁺ + OH⁻
The [OH⁻] = 10⁻⁴.⁸³M = 1.348 x 10⁻⁵M
