Salts such as sodium chloride and Calcium chloride lower the freezing points of aqueous solutions. The reason why this occurs is that

A it is necessary to cool the solution further to compensate for the heat of solution of the salts
B the dissolved salts increase the density of the solution.
C the ions from the dissolved salts interfere with the formation of ice crystals.
D the dissolved salts lower the vapor pressure of the solution.

Question

Salts such as sodium chloride and Calcium chloride lower the freezing points of aqueous solutions. The reason why this occurs is that

A it is necessary to cool the solution further to compensate for the heat of solution of the salts
B the dissolved salts increase the density of the solution. 
C the ions from the dissolved salts interfere with the formation of ice crystals. 
D the dissolved salts lower the vapor pressure of the solution.

abb0t · Answer

which do you think it is? 

Keep in mind that you have NaCl $\rightarrow$ Na$^+$ and Cl$^-$
which can attract positive and negative charges due to their charges.

photon336 · Answer

I thought it was C because adding ions because i thought that would lower freezing point.

rushwr · Answer

I will go for C as well cuz freezing pont is a colligative property hence it depends on the no. of dissolved particles. !

abb0t · Answer

yeah. interferes with the attraction and hence, formation of a solid strucutre, which is a lattice.