[PDF] acidity and basicity of alcohols and phenols

In aqueous solutions, phenols are weakly acidic and lower the pH of a solution. Sodium hydroxide can be used to fully deprotonate a phenol. Water soluble alcohols do not change the pH of the solution and are considered neutral.
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  • Which is more acidic between phenol and alcohol?

    Phenol is more acidic than alcohols due to stabilisation of phenoxide ion through resonance. Presence of electron withdrawing group increases the acidity of phenol by , stabilising phenoxide ion while presence of electron releasing group decreases the acidity of phenol by destabilising phenoxide ion.

  • Do alcohols have lower acidity than phenols?

    Phenols are much more acidic than alcohols because the negative charge in the phenoxide ion is not localized on the oxygen atom, as it is in an alkoxide ion, but is delocalized-it is shared by a number of carbon atoms in the benzene ring.

  • What is the acidity or basicity of alcohols?

    Alcohols are mild acids. Typical aliphatic (i.e. “alkyl”) alcohols such as ethanol, isopropanol, and t-butanol have a pKa of about 16-18, making them slightly more acidic than water. Alcohols that are in conjugation with a pi bond or aromatic ring will be more acidic since the conjugate base is resonance-stabilized.17 oct. 2014
  • Alcohols usually feature the hydroxyl group attached to aliphatic hydrocarbons. Phenols usually contain aromatic hydrocarbons. In comparison to phenol, alcohols are known to be less acidic. Phenols are relatively more acidic in nature and should, therefore, be diluted before usage.
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