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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.
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How is adding ammonia to a mixture going to make it more acidic?
Adding ammonia to a mixture will actually make it more basic, not acidic. Ammonia is a weak base that can accept protons, thereby increasing the concentration of hydroxide ions and leading to a higher pH value.
Why are alcohols considered as weak acids?
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.
Why phenols are more acidic than alcohols but less than carboxylic acids?
Phenols are more acidic than alcohols due to the resonance stabilization of the phenoxide ion formed upon deprotonation. This stability lowers the energy of the phenoxide ion, making it easier for phenols to donate a proton. However, carboxylic acids are more acidic than phenols because the carboxylate ion is stabilized by two electronegative oxygen atoms and resonance delocalization, resulting in further stabilization compared to the phenoxide ion.
What is the most acidic hydride of nitrogen?
The most acidic hydride of nitrogen is ammonia (NH3). This is because ammonia can donate a proton (H+) to a base, making it acidic. The other hydrides of nitrogen, such as hydrazine (N2H4) and hydrogen azide (HN3), are less acidic than ammonia.
Is ammonia or vinegar more acidic?
An acid is a substance which releases H+ ions when dissolved in water (i.e when in aqueous state). Vinegar is a an acid, with a pH of about 2. On the other hand, ammonia is a weak base, with a pH of about 9.
Why aromatic alcohols are more acidic than aliphatic alcohols?
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
How is adding ammonia to a mixture going to make it more acidic?
Adding ammonia to a mixture will actually make it more basic, not acidic. Ammonia is a weak base that can accept protons, thereby increasing the concentration of hydroxide ions and leading to a higher pH value.
Is alcohol more acidic than water?
Generally yes, water has a higher Ka value than most alcohols including beverage alcohol.
Which one is more acidic milk of magnesia or household amonia?
Neither is acidic, both are basic. But milk of magnesia is less basic and therefore more acidic.
Why are alcohols considered as weak acids?
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.
Why phenols are more acidic than alcohols but less than carboxylic acids?
Phenols are more acidic than alcohols due to the resonance stabilization of the phenoxide ion formed upon deprotonation. This stability lowers the energy of the phenoxide ion, making it easier for phenols to donate a proton. However, carboxylic acids are more acidic than phenols because the carboxylate ion is stabilized by two electronegative oxygen atoms and resonance delocalization, resulting in further stabilization compared to the phenoxide ion.
What is the most acidic hydride of nitrogen?
The most acidic hydride of nitrogen is ammonia (NH3). This is because ammonia can donate a proton (H+) to a base, making it acidic. The other hydrides of nitrogen, such as hydrazine (N2H4) and hydrogen azide (HN3), are less acidic than ammonia.
Is ammonia or vinegar more acidic?
An acid is a substance which releases H+ ions when dissolved in water (i.e when in aqueous state). Vinegar is a an acid, with a pH of about 2. On the other hand, ammonia is a weak base, with a pH of about 9.
What is the pka of ch3ch2sh?
The pKa of ethanethiol (CH3CH2SH) is approximately 10.5. This indicates that it is a weak acid, and the thiol group (-SH) can donate a proton in solution. Consequently, it is more acidic than alcohols but less acidic than carboxylic acids.
Are thiols are much more acidic 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
Why phenol more acidic than aliphatic alcohol and water?
Phenol is more acidic than aliphatic alcohols and water because the benzene ring stabilizes the phenoxide ion formed upon deprotonation, making it more favorable to lose a proton. This stabilization is due to resonance delocalization of the negative charge in the phenoxide ion. In aliphatic alcohols and water, there is no such resonance stabilization, resulting in weaker acidity.
Which is more acidic aniline or ammonia?
aniline is more acidic because in aniline a electron withdrawing benzene is connected.electron withdrawing capacity of benzene is due to its delocalizing pi electrons cloud.due the action of benzene the presence of unshared pair of electron over nitrogen is somehow decreases.which increases its acidic nature. But in case of ammonia there is no electron withdrawing group.so its unshared pair of electron remains undistrubed,which decreases its acidity and increases its basisity
