When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?

5.0 g of sodium chloride (NaCl)
9.2 g of potassium chloride (KCl)
11 g of calcium fluoride (CaF2)
20 g of glucose (C6H12O6)
@nechirwan

Question

When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?

 5.0 g of sodium chloride (NaCl) 
9.2 g of potassium chloride (KCl) 
11 g of calcium fluoride (CaF2)
 20 g of glucose (C6H12O6)
@nechirwan

nechirwan · Answer

CaF2. Because it dissociates into 3 molecules (2 x F- and 1 x Ca2+).

nechirwan · Answer

11 g of calcium fluoride (CaF2)