"Molecules of ethanoic acid demerise in benzene due to hydrogen bonding .This normally happens in solvent of low dielectric constant ".Here due to demerisation particles are reduced?What this line mean .ActuallyI am unfamiliar with demerisation and dielectric constant. "
Dimerisation is the process of binding of two molecules of a compound that behaves as a single entity.
Dielectric constant of the liquid denotes its polarity, higher the polarity higher the dielectric constant.
Polar solvents like water have high dielectric constant and hence form hydrogen bonds with the solute (ethanoic acid) molecules, whereas non-polar solvents like benzene do not form hydrogen bonds, this leads to formation of hydogen bonds in between solute i.e ethanoic acid molecules as ethanoic acid is more polar than benzene.
Thus, it dimerises.
Dielectric constant of the liquid denotes its polarity, higher the polarity higher the dielectric constant.
Polar solvents like water have high dielectric constant and hence form hydrogen bonds with the solute (ethanoic acid) molecules, whereas non-polar solvents like benzene do not form hydrogen bonds, this leads to formation of hydogen bonds in between solute i.e ethanoic acid molecules as ethanoic acid is more polar than benzene.
Thus, it dimerises.