Phenols are much more acidic than alcohols. This is indicated in the order of acidity constant:
Ka Gernal formula
PHENOLS 10-10 Ar-OH
ALCOHOLS 10-18 C-OH
Phenols are more acidic due to the formation of phenoxide ions & phenoxide ions are stable due to resonance, the negative charge on oxygen is spread throughout the benzene ring & is delocalised. On the other hand no resonance is possible in alkoxide ions derived from alcohol. The negative charge is localised on single oxygen atom.
Phenols are ''more acidic'' than alcohol since phenols can delocalize its electrons. Also, phenols can remove its hydrogen to make it more stable. The ion is called the phenolate ion.
Acidity depends on the concentration of H+. Due to higher electronegativity of sp2 hybridised carbon of phenol the electron density on the oxygen decreases and hence increases the polarity O-H making the phenol unstable compared to phenolate, so it is more acidic. The C6H5-group is a fully sp2-hybridised electron pulling group.
If you have electron providing groups (sp3) in CH3-CH2-O-H, it may decrease the polarity of O-H bond and destabilize the negatively charged ethanoate group (CH3CH2O-)
Acidity depends on the concentration of H+. Due to higher electronegativity of sp2 hybridised carbon of phenol, the electron density on the oxygen decreases and hence increases the polarity O-H making the phenol unstable compared to phenolate, so it is more acidic. The C6H5-group is a fully sp2-hybridised electron pulling group.
If you have electron providing groups (sp3) in CH3-CH2-O-H, it may decrease the polarity of O-H bond and destabilize the negatively charged ethanoate group (CH3CH2O-)
Alcohol is still slightly acidic. Methanol for instance is around pH 6.8
alcohol. have hydrogen bond
Due to resonance RCOO- ion in carboxyllic acid is more stable than that of RCO- ion in alcohols. Carboxyllic acid can more easily furnish H+ ion than that of alcohols. Carboxyllic acid is more acidic than alcohols.
An ammine ligand attached to a metal ion is remarkably more acidic than a free ammonia molecule
Phenol is more acidic than alcohols since the negative charge that is acquired by removal of a hydrogen atom can be delocalised into the molecules ring structure. acyclic alcohols cannot "spread" this charge as well as conjugated systems and thus will less readily lose their hydrogen atom.
Ketones and aldehydes do not have hydrocarbon atoms which bond to nitrogen or oxygen, individual molecules do not hydrogen bond to each other which makes them have lower boiling points than alcohols.
Yes, because sulfur is a larger atom than oxygen, so can therefore stabilize the conjugate base more effectively. Stability of the conjugate base means increased acidity, ie decreased pH and pKa
Due to resonance RCOO- ion in carboxyllic acid is more stable than that of RCO- ion in alcohols. Carboxyllic acid can more easily furnish H+ ion than that of alcohols. Carboxyllic acid is more acidic than alcohols.
An ammine ligand attached to a metal ion is remarkably more acidic than a free ammonia molecule
aromatic alcohols undergo resonance which stabilizes the conjugate base, in aliphatic alcohols +I effect of alkyl group increase the -ve charge in the conjugate base thus make it unstable
Generally yes, water has a higher Ka value than most alcohols including beverage alcohol.
Phenol is more acidic than alcohols since the negative charge that is acquired by removal of a hydrogen atom can be delocalised into the molecules ring structure. acyclic alcohols cannot "spread" this charge as well as conjugated systems and thus will less readily lose their hydrogen atom.
Ketones and aldehydes do not have hydrocarbon atoms which bond to nitrogen or oxygen, individual molecules do not hydrogen bond to each other which makes them have lower boiling points than alcohols.
molecule
Yes, because sulfur is a larger atom than oxygen, so can therefore stabilize the conjugate base more effectively. Stability of the conjugate base means increased acidity, ie decreased pH and pKa
Tertiary alcohols have a bulky alkyl group bonded to the carbon atom that carries the hydroxyl group. This bulky group hinders the approach of the sodium atom, making the reaction less rapid. In contrast, primary alcohols have a smaller alkyl group and allow for easier access and reaction with metallic sodium.
No. Phenol is far more acidic than water.
The answer is lemon is the most acidic with pH 2; the next most acidic is tomato with pH 4.The soap with pH 10 is alkaline; and ammonia with pH11.5 is more alkaline than the soap.To understand pH, always remember that the values from 1 to 7 are all acidic, neutral is 7.5, and all the values from 8 to 14 are alkaline.
a lemon is more sour than a grapefruit because it is more acidic.