1. Step 1: Calculate the particle concentration of each solution.
PROBLEM: List the following aqueous solutions in order of increasing melting point. (The last three are all assumed to dissociate completely into ions in water.) (a) 0.1 m sugar (b) 0.1 m NaCl (c) 0.08 m CaCl2 (d) 0.04 m Na2SO4
Step 1: Calculate the particle concentration of each solution.
Solute Solution Concentration i Particle Concentration
Sugar 0.1 m x 1 = 0.1 m
NaCl 0.1 m x 2 = 0.2 m
CaCl m x 3 = m
Na2SO m x 3 = m
Step 2: List in order of increasing melting point (highest particle concentraction = lowest melting point.
0.08 m CaCl2 < 0.1 m NaCl < 0.04 m Na2SO4 < 0.1 m sugar