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The vapour density of completely dissociated ammonium chloride is half that of ammonium chloride. Why so?

The vapour density of completely dissociated ammonium chloride is half that of ammonium chloride. Why so?

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1 Answers

Arun
25750 Points
6 years ago
Dear Rishabh
 
Please find below the solution to the asked query:
The vapour density of a substance has a direct relationship with the molecular mass.
molecular mass = 2 * vapour density
Fully dissociated NH4Cl exists in the form of ions.
NH4Cl ---------> NH4+  +  Cl–
Thus, the molecular mass of the species becomes half of the molecular mass of pure NH4Cl.
As a result, the vapour density of a fully dissociated NH4Cl is half the vapour density of pure NH4Cl.

Regards
Arun (askIITians forum expert)

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