The answer lies in the stability of the conjugate bases formed by these two acids.
We only need to compare the point of difference among the two:
Benzoic acid : Ph-COO-
The phenyl ring has a minus I (inductive effect ) and also pulls the -ve charge density on oxygen atom through resonance. this leads to the formation of a stable conjugate base. so benzoic acid is quite acidic.
Acetic acid : CH3COO-
The methyl group has a plus I (inductive effect ) and pushes the electron cloud towards oxygen which already has a negative charge. This destabilizes the molecule and thus the acidity of the molecule and thus acetic acid is less acidic.
The answer lies in the stability of the conjugate bases formed by these two acids.
We only need to compare the point of difference among the two:
Benzoic acid : Ph-COO-
The phenyl ring has a minus I (inductive effect ) and also pulls the -ve charge density on oxygen atom through resonance. this leads to the formation of a stable conjugate base. so benzoic acid is quite acidic.
Acetic acid : CH3COO-
The methyl group has a plus I (inductive effect ) and pushes the electron cloud towards oxygen which already has a negative charge. This destabilizes the molecule and thus the acidity of the molecule and thus acetic acid is less acidic.
Benzoate ion (conjugate base) which we get after removal of Hydrogen ion from Benzoic acid is more stabilized due to resonance.
Benzoate ion (conjugate base) which we get after removal of Hydrogen ion from Benzoic acid is more stabilized due to resonance.
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The answer lies in the stability of the conjugate bases formed by these two acids.
We only need to compare the point of difference among the two:
Benzoic acid : Ph-COO-
The phenyl ring has a minus I (inductive effect ) and also pulls the -ve charge density on oxygen atom through resonance. this leads to the formation of a stable conjugate base. so benzoic acid is quite acidic.
Acetic acid : CH3COO-
The methyl group has a plus I (inductive effect ) and pushes the electron cloud towards oxygen which already has a negative charge. This destabilizes the molecule and thus the acidity of the molecule and thus acetic acid is less acidic.
The answer lies in the stability of the conjugate bases formed by these two acids.
We only need to compare the point of difference among the two:
Benzoic acid : Ph-COO-
The phenyl ring has a minus I (inductive effect ) and also pulls the -ve charge density on oxygen atom through resonance. this leads to the formation of a stable conjugate base. so benzoic acid is quite acidic.
Acetic acid : CH3COO-
The methyl group has a plus I (inductive effect ) and pushes the electron cloud towards oxygen which already has a negative charge. This destabilizes the molecule and thus the acidity of the molecule and thus acetic acid is less acidic.
More
VOTE