Which of the following solutions will have the lowest freezing point?
a. 1 molar kcl solution
b. 1 molar fecl3 solution
c. 1 molar cacl2 solution
d. 1 molar nacl solution

The answer to this question would be b.

3 things affect the freezing point of water, a constant(Kf), molality(b) and a number of dissolved particles (i).

Kf is a constant so that has the same effect. Because you have 1 mole of everything, molality is also constant.

so the only thing you gotta look after is the number of the dissolved particles which which iron III chloride has the highest

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )