What is the relation between the depression i | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The depression in freezing point $(\Delta T_f)$ is given by the formula: $\Delta T_f = K_f \cdot m$,where $m$ is the molality of the solution.
Mo

Vedclass · Accepted Answer

$M_2 = \frac{1000 \cdot K_f \cdot W_2}{\Delta T_f \cdot W_1}$

Vedclass · Answer

(D) The depression in freezing point $(\Delta T_f)$ is given by the formula: $\Delta T_f = K_f \cdot m$,where $m$ is the molality of the solution.
Molality $(m)$ is defined as the number of moles of solute $(n_2)$ per kilogram of solvent $(W_1 	ext{ in grams})$: $m = \frac{W_2 \cdot 1000}{M_2 \cdot W_1}$.
Substituting this into the depression in freezing point equation: $\Delta T_f = K_f \cdot \frac{W_2 \cdot 1000}{M_2 \cdot W_1}$.
Rearranging the formula to solve for the molar mass of the solute $(M_2)$: $M_2 = \frac{1000 \cdot K_f \cdot W_2}{\Delta T_f \cdot W_1}$.

What is the relation between the depression in freezing point and the molar mass of a non-volatile solute?

Similar Questions

The freezing point of an aqueous solution containing $17 \ g$ of $C_2H_5OH$ in $1000 \ g$ of water is ......... $^oC$. (Given $K_f$ of water $= 1.86 \ K \ kg \ mol^{-1}$)

$1 \ kg$ of $0.75 \ m$ aqueous solution of sucrose is cooled to $-4^{\circ} C$. The amount of ice (in $g$) that will be separated out is .... . (Nearest integer)
Given: $K_{f}(H_{2}O) = 1.86 \ K \ kg \ mol^{-1}$

The freezing point of a diluted milk sample is found to be $-0.2\ ^\circ C$,while it should be $-0.5\ ^\circ C$ for pure milk. How much water has been added to pure milk to make the diluted sample?

Which of the following formulae is used to calculate the depression in freezing point?

$31 \ g$ of ethylene glycol $(C_2H_6O_2)$ is dissolved in $600 \ g$ of water. The freezing point depression of the solution is ($K_f$ for water is $1.86 \ K \ kg \ mol^{-1}$) (in $K$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module