A solution of calcium chloride, CaCl2, will lower the freezing point of water to a greater extent than an equal concentration of NaCl because the solution of calcium chloride:

absorbs more heat
has greater polarity
ionizes more completely
has a more positive ion, Ca+2
produces more ions

Question

A solution of calcium chloride, CaCl2, will lower the freezing point of water to a greater extent than an equal concentration of NaCl because the solution of calcium chloride:

absorbs more heat
has greater polarity
ionizes more completely
has a more positive ion, Ca+2
produces more ions

anonymous · Answer

It produces more ions hence van't hoff factor is higher for CaCl2 than NaCl hence freezing point is lowered more. Change in freezing point= i*K*m. i=van't hoff's factor,K=constant, m=molality.