Question
Ionisation constant of a weak base MOH, is given by the expression.$\text{K}_\text{b}=\frac{[\text{M}^+][\text{OH}^-]}{[\text{MOH}]}$
Values of ionisation constant of some weak bases at a particular temperature are given below:
Arrange the bases in decreasing order of the extent of their ionisation at equilibrium. Which of the above base is the strongest?
Values of ionisation constant of some weak bases at a particular temperature are given below:
|
Base
|
Dimethylamine
|
Urea
|
Pyridine
|
Ammonia
|
|
$K_b$
|
$5.4 \times 10^{–4}$
|
$1.3 \times 10^{–14}$
|
$1.77 \times 10^{–9}$
|
$1.77 \times 10^{–5}$
|
