since the freezing point of a solution depends on the relative number of particles, what would you calculate to be the freezing point of 0.1m solutions in water of a) NaCl b) BaCl2? assume that these salts are 100% ionized in solution.( compare your answers with the actually respective freezing points: -0.348 and -0.470 C. the difference is due to the decreased activity of the ions. because of the attractive forces between the positive and negatively charged ions, they do not move completely independently of one another.)
if you were using molality, the equation would be delta t = k * molality. instead of molality, the equation I gave uses i (vant hoff factor, basically the number of moles in solution per 1 mole solute added) times molarity.