The molar mass of a volatile substance cannot be determined from … - Vidyadip

Question

The molar mass of a volatile substance cannot be determined from boiling point elevation. Why?

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Answer

Boiling point elevation methods are suitable for only non-volatile substances because when a volatile substance is added to a solution and heated, then the volatile substance comes out as a vapour due to which there will be no elevation in boiling point, hence molar mass of volatile substance cannot be determined by this method.

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