What is molal depression constant? Does it depend on nature of the solute ?

Explanation

`K _(f) =` molar freezing point depression constant or cryoscopic constnat.
`Delta T _(f) = K_(f).m,` where `Delta T_(f)=` depression in freezing point, m = molality of the solution
`K_(f)=` cryoscopic constant
If `m =1, Delta T_(f) = K _(f)`
i.e., cryoscopic constant is equal to the depression in freezing point for 1 molal solution cryoscopic constant depends on the molar concentration of the solute particles. `K_(f)` is directly proportional to the molar concentration of the solute particles.
`Delta T_(f) = K _(f) xx (W_(B) xx 1000)/( M _(B) xx W_(A))`
`W_(B)=` mass of the solute, `W_(A)=` mass of solvent, `M _(B)=` molecular mass of the solute.