Question
Chemistry Question on Phenols
The ionisation constant of phenol is higher than that of ethanol because
A
phenoxide ion is a stronger base than that of ethoxide ion
B
phenoxide ion is stabilized through delocalization
C
phenoxide ion is less stable than ethoxide ion
D
phenoxide ion is bulkier than ethoxide ion.Phenol
Answer
phenoxide ion is stabilized through delocalization
Explanation
Solution
The ionization constant of phenol is more than that of ethanol because phenoxide ion is stabilized by resonance.
Note: Ionization constant (Ka) of phenol is more than that of ethanol indicates phenol is more acidic than alcohol. Phenol on ionization gives phenoxide ion it is stabilized by resonance.