I was doing this problem:
Which one has the lowest freezing point:
A).15M NaCl
B).10M CaCl2
c).10M NaCl
D).15M CaCl2
Correct Answer: D
I wanted to make sure I was doing this problem the right way. I looked at the formula delta T = imkf where "kf" is freezing point constant. So delta T and "i" are directly proportional, so which ever salt has the highest "i" will have the greatest change in temperature therefore the lowest freezing point.