The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to : (a) ionization of benzoic acid.(b) dimerization of benzoic acid.(c) trimerization of benzoic acid.(d) solvation of benzoic acid.
Answers
Answer:
(b) dimerization of benzoic acid is the correct answer.
Explanation:
The molecular weight is the total mass of any given molecule.
The standard unit is amu that is atomic mass unit.
It is denoted by m.
Benzoic acid has formula C7H6O2.
It is carboxylic acid.
It is used for prevention of bacteria and other harmful substances.
Benzene has formula C6H6.
It is widely used in chemical industries.
It is used in lubricants and dyes.
Depression in freezing point is the temperature at which there is decrease in temperature on addition of non volatile solute to the solvent.
It is directly proportional to the molality of the solute.
The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to dimerization of benzoic acid.
This happens because of the phenomenon of hydrogen bond.
Benzoic acid thus occurs as a dimer.