Question

Briefly explain how will you estimate the molecular size of oliec acid ?

Answer 1

Explanation:

Volume of n drops of solution = n × ν cm3 where ν cm3 is the volume of each drop. If the film has one molecular thickness, then the thickness of oleic acid film will directly give the approximate size or diameter of a molecule of oleic acid. The value comes out to be of the order of 10-9 m.