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 CaCl2 0.08 m x 3 = 0.24 m Na2SO4 0.04 m x 3 = 0.12 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