Question

How will you estimate the molecular diameter of oleic acid?

Answer 1

Answer:

• The drop quickly spreads into a thin, large circular film of a molecular thickness.
• This is the oleic acid molecules standing on their hydrophilic ends. We can measure the diameter of this circle using which we can calculate

Answer 2

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We can measure the diameter of this circle using which we can calculate the area 'A'. If 'v' is the volume of one drop, then the volume of n drops of solution is 'nv'. Based on the assumption that the layer is one molecule thick, we obtain the value of the size of the oleic acid molecule