# Chapter 13 Solutions and Their Behavior - Study Questions - Page 505c: 54

#### Work Step by Step

Boiling point elevation and vapor pressure depression are proportional to $i.m$ and assuming total ionic dissociation, i is the number of ions per compound. a) sugar 0.15m, Na2SO4: $3\times 0.10\ m=0.30\ m$ -> the Na2SO4 will have a higher boiling point b) NH4NO3 $2\times 0.30\ m=0.60\ m$, Na2SO4 $3\times 0.15\ m=0.45\ m$ -> NH4NO3 will have a higher vapor pressure (Na2SO4 will have a higher vapor pressure depression).

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