# Chapter 13 Solutions and Their Behavior - Study Questions - Page 505b: 49

See the answer below.

#### Work Step by Step

By definition, the freezing point depression is $\Delta T_f=K_f.m.i$ Since these are all aqueous solutions, the ones with the lowest freezing points are the ones with the greater $i.m$ product, and we need to assume complete ionic dissociation, i.e, i is the number of ions per compound: a) $i.m=1\times 0.1m=0.1m$ b) $i.m=2\times 0.2\ m=0.2\ m$ c) $i.m=3\times 0.08\ m=0.24\ m$ d) $i.m=3\times 0.04\ m=0.12\ m$ $c\lt b\lt d\lt a$

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