The ionization constant of phenol is higher than that of ethanol because :

Question

The ionization constant of phenol is higher than that of ethanol because :, Phenoxide ion is bulkier than ethoxide, Phenoxide ion is stronger base than ethoxide, Phenoxide ion is stabilized through delocalization, Phenoxide ion is less stable than ethoxide

MARKS App · Accepted Answer

The acidic nature of phenol is due to the formation of stable phenoxide ion in solution $ C 6 ​ H 5 ​ OH + H 2 ​ O ⇌ C 6 ​ H 5 ​ O Phenoxide ion − ​ + H 3 ​ O + T h e p h e n o x i d e i o ni ss t ab l e d u e t oreso nan ce . im g src = " h ttp s : // c d n − q u es t i o n − p oo l . g e t ma r k s . a pp / p y q / bi t s a t / V tt J 3 r 5 W 3 I − C A a X j K p − A iY l 2 k q d RZ o a Z U 0 w − wq A HrK 0. or i g ina l . f u ll s i ze . p n g " > b r > T h e n e g a t i v ec ha r g e i s d e l oc a l i ze d in t h e b e n ze n er in g w hi c hi s a s t abi l i z in g f a c t or in t h e p h e n o x i d e i o nan d in cre a se a c i d i t yo f p h e n o l . w h er a s n oreso nan ce i s p oss ib l e ina l k o x i d e i o n s \left(\mathrm{RO}^{-}\right)$ derived from alcohol. The negative charge is localized on oxygen atom. Thus, alcohols are not acidic.

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