Chemistry - which of the following liquids will have the lowest freezing point?

freezing point of water gets lowered by 1.86 degrees cellsius for each mole of solute particles in solution

see: http://en.wikipedia.org/wiki/Freezing-point_depres...

b. acqueous KF (0.50 m) releases twice as many ions: 1.0 Molar ions

c acqueous FeI3 (0.24 m) releases 4 X's as many ions : 0.96 Molar ions

d. acqueous glucose (0.60 m) releases no ions : 0.60 Molar molecules

e. acqueous sucrose (0.60 m releases no ions : 0.60 molecules

your answer is

b. acqueous KF (0.50 m)