Hey guys. I was doing questions in the G-chem section of destroyer today, and noticed something. In destroyer, there were a few simple problems relating to freezing point depression or boiling point elevation, and usually asking to solve for one of the terms, or mw from the molality. Anyway, I totally understand the chemistry behind these problems, but my question lies within the equations used. Destroyer was using the equation (ie: for bp) Tbp = (Kbp)(m)(i), where (i) is the "Vant-Hoff" factor (a coefficient factored in for species that can dissociate, for ex: Na2(NO3) can break up into Na and NO3, so the (i) = 2). But in KAPLAN, they do not use (i) in their equation. Now, I know when (i) = 1 it doesnt matter............but the few times you do need it...which equation is correct??? Also, the same question but for a different equation. Involving osmoregulation n = MRT(i).....again destroyer uses the (i), and KAPLAN does not. Thanks in advance. Anyone shed some insight?