Question

why is van't Hoff factor for dilute solution .​

Answer 1

$\huge\bold\red{HELLO!}$

There is a complicating factor: ionic solutes separate into ions when they dissolve. This increases the total number of particles dissolved in solution and increases the impact on the resulting colligative property. ... The ideal van't Hoff factor is equal to the number of ions that form when an ionic compound dissolves.