Question

calculate the depression in freezing point of a 0.2molal solution if if for water is 1.86k kgmol-1 ?​

Answer 1

Answer:its a formula...

I hope it helps❤

Explanation:

Answer 2

Answer:

$\bigstar{\bold{Depression\:in\:freezing\:point\:=\:0.372 \:K}}$

Explanation:

$\Large{\underline{\underline{\bf{Given:}}}}$

• Molality of solution(m) = 0.2 m
• Depression constant of water($K_f$) = 1.86kg/mol

$\Large{\underline{\underline{\bf{To\:Find:}}}}$

• Depression in freezing point (Δ$T_f$)

$\Large{\underline{\underline{\bf{Solution:}}}}$

→ The equation for finding depression in freezing point is given by

   Δ$T_f\:=\:K_f\times\:m$

→ Substituting the given datas, we get

  Δ$T_f\:=\:1.86\times0.2$

  $\boxed{\bold{\Delta\:T_f\:=\:0.372\:K}}$

$\Large{\underline{\underline{\bf{Notes:}}}}$

→ The freezing point depression constant is also called Molal depression constant or cryoscopic constant

→ Depression of freezing point is directly proportional to molality of the solution.